Description : A solution of 30 litres of milk and water, has ` 70%` milk. How many litres of water must be added so that the volumes of milk and water will be in th
Last Answer : A solution of 30 litres of milk and water, has ` 70%` milk. How many litres of water must be added so that the volumes ... : 2`? A. 6 B. 3 C. 5 D. 4
Description : A mixture contains milk and water in the ratio of 3:2 litter of water is added to the mixture, milk, milk and water in the mixture become equal find the quantities of milk and water in the mixture . a) 12, 8 litter b) 4,3 litter c) 12, 6 litres d) 10,8 litres e) None of these
Last Answer : Let quantities of milk and water in the mixture be 3x and 2x. Then if 4 litres of water is added to the mixture the ratio of milk and water become 1:1. It can be written as (3x): (2x + 4) = 1 ... Therefore, the milk in the mixture is 4x3 = 12 litres and quantity of water = 4x2 = 8 liters Answer: a)
Description : 175 litres of a solution contains `88%` of acid and the rest water. How many liters of water must be added such that the resulting mixture contains `2
Last Answer : 175 litres of a solution contains `88%` of acid and the rest water. How many liters of water ... that the resulting mixture contains `23%` of water ?
Description : In 165 litres of mixtures of milk and water, water is only 28%. The milkman sold 40 litres of this mixture and then he added 30 litres of pure milk and 13 litres of pure water in the remaining mixture. What is the percentage ... mixture? 1) 29.35% 2) 28. 57% 3) 24. 57% 4) 27. 75% 5) 26. 57%
Last Answer : 2) 28. 57%
Description : From a cask of milk containing 45 litres, 9 litres are drawn out and the cask is filled up with water.If the same process is repeated a second, then a third time, what will be the number of litres of milk left in the cask? a) 31.2 b) 20.9 c) 23.04 d) 12.39 e) 15.36
Last Answer : C where x is the initial quantity of milk in the cask y is the quantity of milk withdrawn in each process and n is the number of processes. Initial quantity:45 Withdrawn quantity=9 number of times repeated=3 ... ] Quantity of milk left after the 3rd operation =45*(45-9)/45)^3 = 23.04 litres.
Description : From a vessel containing 100 litres of wine,10 litres are drawn out and an equal amount of water is added. From the mixture,10 litres is again drawn out and same quantity of water is added. What is the final ratio of wine and water? a) 91 : 9 b) 81 : 19 c) 80 : 20 d) 90 : 10 e) None of these
Last Answer : Quantity of wine after two replacements = 100 l × (90/100)2 =81 l Required ratio = 81 : ( 100 – 81 )= 81 : 19 Answer: b)
Description : In 20 litres of a mixture, the ratio of sugar syrub to honey syrub is 5:1. In order to make the ratio of sugar syrub to honey syrub as 3:1, the quantity of honey syrub that should be added to the mixture will be A) 5 2/3 B) 4 1/3 C) 6 2/3 D) 2 2/9
Last Answer : D By the rule of alligation Quantity of honey : Quantity of mixture =1/12:3/4}=1:9 Given that quantity of mixture = 20 litre =>Quantity of honey : 20 = 1 : 9 => Quantity of honey = 20 x1/9 = 2 2/9 litre
Description : A shopkeeper has 2 cans of milk. The first contains 30% water and the rest milk. The second contains 50% water. How much milk should he mix from each of the cans so as to get 12 litres of milk such that the ratio of water to milk ... 7 lit. 2) 9 lit, 3 lit. 3) 7.5 lit, 4.5 lit. 4) 4 lit, 8 lit.
Last Answer : 3) 7.5 lit, 4.5 lit.
Description : A milk vendor has 2 cans of milk. The first contains 25% water and the rest milk. The second contains 50% water. How much milk should he mix from each of the containers so as to get 12 litres of milk such that the ratio of water to milk is 3 : 5? a) 2 b) 3 c) 4 d) 7 e) 6
Last Answer : E Let cost of 1 litre milk be Rs.1 Milk in 1 litre mix in 1st can =3/4 litre Cost Price(CP) of 1 litre mix in 1st can = Rs. 3/4 Milk in 1 litre mix in 2nd can 1/2 litre. Cost Price(CP) of 1 ... 2nd can :mix in 1st can =1/8:1/8=1:1 ie, from each can,1/2* 12 = 6 litre should be taken.
Description : A vessel contains milk and water in the ratio of 4:3. If 14 litres of the mixture is drawn and filled with water, the ratio changes to 3:4. How much milk was there in the vessel initially? a) 24 b) 32 c) 40 d) 48 e) None of these
Last Answer : Answer: B milk = 4x and water = 3x milk = 4x – 14*4/7 and water = 3x – 14*3/7 + 14 4x – 8: 3x + 8 = 3:4 X = 8, so milk = 8*4 = 32 litres
Description : A sample of x litres from a container having a 60 litre mixture of milk and water containing milk and water in the ratio of 2 : 3 is replaced with pure milk so that the container will have milk and water in equal ... . What is the value of x? a) 6 litres b) 10 litres c) 30 litres d) None of these
Last Answer : C Another way for solving this sum is by choice The mixture of 60 litres has in it 24 litres of milk and 36 litres of water. (2 : 3 :: milk water) When you remove x litres from it, you ... have 30 litres of milk and 30 litres of water - i.e. milk and water are in equal proportion.
Description : How many litres of a 36 litre mixture containing milk and water in the ratio of 4 : 6 be replaced with pure milk so that the resultant mixture contains milk and water in equal proportion? a) 3 b) 2 c) 4 d) 7 e) 6
Last Answer : E The mixture contains 40% milk and 60% water in it. That is 14.4 litres of milk and 21.6 litres of water. Now we are replacing the mixture with pure milk so that the amount of milk and water in the ... containing 60% water, we need to remove ={3.6}/{0.6} litres of the mixture = 6 litres
Description : 45 litres of water per person per day, is provided in (A) Office buildings (B) Hotels (C) Hostels (D) Nurse's homes
Last Answer : (A) Office buildings
Description : Two jars having a capacity of 3 and 5 litres respectively are filled with mixtures of milk and water. In the smaller jar 25% of the mixture is milk and in the larger 25% of the mixture is water. The jars are emptied ... the percentage of milk in the cask. a) 55% b) 50% c) 45% d) 25% e) None of these
Last Answer : Answer: D 0.75+3.75=4.5/10+8*100=4.5/18*100=25%
Description : A container contains 55 litres of milk. From this container 5.5 litres of milk was taken out and replaced by water. This process was repeated further two times. How much milk is now contained by the container? a) 32 b) 29.16 c) 43 d) 27.12 e) 40.09
Last Answer : E Where x is the initial quantity of milk in the cask y is the quantity of milk withdrawn in each process and n is the number of processes. Initial quantity:55 Withdrawn quantity=5.5 number of times repeated ... of milk left after the 3rd operation =55*((55-5.5)/55) ^3 =40.09litres.
Description : A single petrol tank supplies the petrol to the whole city, while the petrol tank is fed by a single pipeline filling the tank with the stream of uniform volume. When the petrol tank is full and if 20, ... petrol can be used daily without the supply every failing? a) 28000 b) 47000 c) 24000 d) 42000
Last Answer : A Let x litre be the per day filling and y litre be the capacity of the tank, then 45x + y = 20000 × 45 =900000…. (1) 30x + y = 16000 × 30 =480000…. (2) Solving eq. (1) and (2), we get 15x=420000 X=420000/15 x = 28000 Hence, 28000 litres per day can be used without the failure of supply
Description : Calculate quantity of water to be added for casting cubes in laboratory by 12.5 kg cement if w/c ratio 0.45.
Last Answer : As w/c = (weight of water / weight of cement) w/c = (Ww / Wc) 0.45 = (Ww / 12.5) Ww = (0.45x12.5) Ww = 5.625 kg or 5.625 Litres
Description : A vessel contains 100 litres of milk. From this, 10 litres of milk was taken out and replaced by water. The process was repeated further two times. How much milk is now contained by the vessel? a) 72.9 litres b) 60.4 litres c) 71.6 litres d) 81 litres e) None of these
Last Answer : Milk after three replacement =100 × (90/100)3 = 72.9 litres Answer: a)
Description : A milkman mixes 20 litres of water with 80 litres of milk. After selling one-fourth of this mixture, he adds water to replenish the quantity he has sold, what is the current proportion of water to milk? a) 1 : 3 b) 2 : 3 c) 3 : 4 d) 4 : 3 e) None of these
Last Answer : Milk remaining after selling 1/4 of mixture = 80 ×(1- 1/4)=60 litres =>water =100-60 = 40 litres => Required ratio = 40 : 60 =2 : 3 Answer: b)
Description : If 30% excess water is added, the strength of concrete is reduced by (a) 30% (b) 40% (c) 50% (d) 60%
Last Answer : (c) 50%
Description : How many litres of milk would it take to fill a 12 000 mL jug?
Last Answer : Need answer
Description : (3) prevents freezing of petrol Explanation: Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound widely used as an automotive antifreeze and a precursor to polymers. In its pure form, it is ... A mixture of 60% ethylene glycol and 40% water freezes at -45 degree C (- 49 degree F).
Last Answer : Rust is - (1) A mixture of Fe₂O₃ and Fe(OH) ₂ (2) A mixture of FeO and Fe(OH)₂ (3) FeO only (4) A mixture of Fe₂O₃, 3H₂O and FeO
Description : In 1 kg mixture of iron and carbon, 40% is carbon. How much iron should be added so that the proportion of carbon becomes 20% a)1.5kg b)2kg c)3kg d)5kg e)1kg
Last Answer : E Quantity of the mixture : Quantity of iron = 20 : 20 = 1 : 1 Given that quantity of the mixture = 1 kg Hence quantity of iron to be added = 1 kg
Description : In 2000-2001 the use of mechanical & electrical increased from a)20% to 45%. c) 45% to 75% b) 45 to below 83% d)40% to over 83 %
Last Answer : 40% to over 83 %
Description : A shopkeeper bought 30 kg of wheat at the rate of Rs 45 per Kg. He sold 40% of the total quantity at the rate of Rs 50 per Kg. Approximately, at what price per Kg should he sell the remaining quantity to make 25 per cent overall profit? 1. Rs 54 2. Rs 52 3. Rs 50 4. Rs 60
Last Answer : 4. Rs 60
Description : If in 2000 nominal GDP is = `70000 Crore and the prices in 2000 were 40% more than the real GDP in 2000 using 1996 as a base year is (a) `45,000 Crore ; (b) `50,000 Crore ; (c) `42,000 Crore ; (d) `98000 Crore
Last Answer : (b) `50,000 Crore ;
Description : In a batch, 40% of the students offered Maths, 30% offered science and 15% offered both. If a student is selected at random, what is the probability that they has offered science or maths? A) 0.55 B) 0.65 C) 0.45 D) 0.75
Last Answer : Answer: A) P(M) = 0.40 P(S) =0.30 and P(M∩S) = 0.15 P(M∪S) = P(M) + P(S) - P(M∩S) = 0.55
Description : Equal quantities of 3 mixtures of milk and water are mixed in the ratio 1:3, 2:3 and 3:4.The ratio of water and milk in the new mixture is A) 45:76 B) 151:269 C) 123:154 D) 145:245 E) None of these
Last Answer : Answer: B Milk = 1/4 : 2/5 :3/7 = 35/140 :56/140 : 60/140 Quantity of milk in new mix = 35+56+60 = 151 Quantity of water in new mix = 140*3 = 420-151 = 269 M:W = 151:269
Description : A man buys milk at Rs. 2.40 per litre. He adds one-third water to it and sells the mixture at Rs. 2.88 per litre. Find his profit percentage. (Assume water is free). a) 21% b) 30% c) 40% d) 50% e) 60%
Last Answer : Let say he purchases 3 litres of milk whose cost is Rs. 7.20 He adds 1 litre of water and the mixture of 4 litres is sold at Rs 2.88 × 4 = Rs11.52 Profit percentage = (11.52 – 7.20) × 100.0/7.20 = 4.32 × 100.0/7.2 = 60% Answer: e)
Description : How many grams of CH3OH must be added to water to prepare 150 mL of a solution that is 4.5 M CH3OH?
Last Answer : The answer is 9.6 grams.
Description : What is the molar mass of haemocyanin and the freezing point of the solution when an aqueous solution is prepared by dissolving 1.5 grams of haemocyanin a protein obtained from crabs in 0.25 litres of?
Last Answer : Haemocyanins are a group of proteins.
Description : Shan bought 30 liters of milk at the rate of Rs.8 per liter. He got it churned after spending Rs.10 and 5kg of cream and 30 liter of toned milk were obtained. If he sold the cream at Rs.30 per kg and toned milk at Rs.4 per liter, his profit in the transaction is: A. 20% B. 8% C. 30% D. 40%
Last Answer : Answer – B .8% Explanation: CP =Rs.(30 x 8 + 10) = Rs.250 SP = Rs. (30 x 5 + 30 x 4) = Rs.270 Gain% = (20/250 x 100)% = 8%
Description : Harshith is a successful milk vector in salem. He sold half of the milk at 40% profit, half of the remaining milk at 40% loss and he rest was sold at his cost price. In the total transaction, his gain or loss will be
Last Answer : total CP= Rs 100 total SP=[ 140/2+ 60/4+100/4] = 280+60+100/4 =440/4 =110 Gain=sp-cp=110-100=10 Gain% = 10/100*100=10%
Description : A molar solution is one that contains one mole of a solute in [IIT 1986] (A) 1000 g of the solvent (B) One litre of the solvent (C) One litre of the solution (D) 22.4 litres of the solution
Last Answer : (C) One litre of the solution
Description : How many quarts of pure antifreeze must be added to 4 quarts of a 20 antifreeze solution to obtain a 40 antifreeze and solution?
Last Answer : You need 1 1/3 quarts of pure antifreeze.
Description : If water required for 1 bag of cement is 30 litres, the water cement ratio is: (A) 0.40 (B) 0.50 (C) 0.60 (D) None of these
Last Answer : Answer: Option C
Description : 400 gm spirit solution has 30 % spirit in it , what is the ratio of spirit should be added to make it 80 % in the solution ? A)2:5 B)4:3 C)5:2 D)2:7
Last Answer : A)2:5
Description : Express the ratio ` 1. 5` litres : 250 ml in the lowest terms.
Last Answer : Express the ratio ` 1. 5` litres : 250 ml in the lowest terms.
Description : A container contains a mixture of two liquids P and Q in the ratio 7 : 5. When 9 litres of mixture are drawn off and the container is filled with Q, the ratio of P and Q becomes 7 : 9. How many litres of liquid P was contained in the container initially? a) 12 b) 21 c) 93 d)17 e) None
Last Answer : B Let initial quantity of P in the container be 7x and initial quantity of Q in the container be 5x Now 9 litres of mixture is drawn off from the container. Quantity of P in 9 litres of the mixture drawn off ... = 7 : 9 x=16* 21/4*28 Litres of P contained in the container initially =7x = 21
Description : . An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is (A) 4000 (B) 9000 (C) 4600 (D) 3000
Last Answer : (A) 4000
Description : Vinegar is a (a) 5% solution of acetic acid in water (b) 25% solution of acetic acid in water (c) 50% solution of acetic acid in water (d) 40% solution of formic acid in water
Last Answer : 5% solution of acetic acid in water
Description : Formalin is (a) 10% solution of formaldehyde in water (b) 20% solution of formaldehyde in water (c) 40% solution of formaldehyde in water (d) 80% solution of formaldehyde in water
Last Answer : 40% solution of formaldehyde in water
Description : What number must be added to each term of the ratio 7:5 so that it becomes 4:3?
Last Answer : What number must be added to each term of the ratio 7:5 so that it becomes 4:3?
Description : Two vessels contains equal quantity of solution contains milk and water in the ratio of 7:2 and 4:5 respectively. Now the solutions are mixed with each other then find the ratio of milk and water in the final solution? A) 11:7 B) 11:6 C) 11:5 D) 11:9 E) None of these
Last Answer : Answer: A milk = 7/9 and water = 2/9 – in 1st vessel milk = 4/9 and water = 5/9 – in 2nd vessel (7/9 + 4/9)/ (2/9 + 5/9) = 11:7
Description : The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is A. 100 cm B. 110 cm C. 120 cm D. 150 cm
Last Answer : ANS: C
Description : Pure (R) Mandelic acid has specific rotation of 150. If a sample contains 60% of the R and 40% of its enantiomer, the `[alpha]` of his solution is.
Last Answer : Pure (R) Mandelic acid has specific rotation of 150. If a sample contains 60% of the R and 40% of its enantiomer, the `[alpha]` of his solution is.
Description : 125mL of 63% (w/v) `H_(2)C_(2)O_(4).2H_(2)O` solution is made to react with 125mL of a `40%` (w/v) `NaOH` solution. The resulting solution is : (ignor
Last Answer : 125mL of 63% (w/v) `H_(2)C_(2)O_(4).2H_(2)O` solution is made to react with 125mL of a ... ions) A. netural B. acidic C. strongly acidic D. alkaline
Description : In what ratio must a person mix three kinds of Oats costing him Rs 1.20,Rs 1.44 and Rs 1.74 per Kg so that the mixture may be worth Rs 1.41 per Kg? A)11:77:7 B) 11:45:7 C)25:45:8 D) 27:23:6
Last Answer : A)11:77:7
Description : How much shareholding is must for the promoters of insurance companies after their listing? A) 40% B) 50% C) 49% D) 52% E) None of these
Last Answer : B) 50% Explanation: Promoters of insurance companies will be forced to maintain their shareholding at 50 per cent even after listing under the guidelines proposed by the insurance regulator ... Insurance Regulatory and Development Authority of India s (IRDAI) draft guidelines for listed companies.
Description : battery must be turned over to a charging station in winter if discharged by a) 50% b) 40% c) 30% d) 25%
Last Answer : d) 25%