Description : A shopkeeper has one spherical laddoo of radius 5 cm. With the same amount of material, how many laddoos of radius 2.5 cm can be made ? -Maths 9th
Last Answer : Radius of a big spherical laddoo = 5 cm ∴ Volume of the big spherical laddoo = 4 / 3 π 5 5 5 cm3 Radius of a small spherical laddoo = 2.5 = 5 / 2 cm ∴ Volume of the small spherical laddoo = 4 / ... = 2 2 2 = 8 Hence , with the same amount of big laddoo, 8 small laddoos can be made.
Description : A shopkeeper has one spherical laddoo of radius 5 cm. With the same amount of material, how many laddoos of radius 2.5 cm can be made? -Maths 9th
Last Answer : NEED ANSWER
Last Answer : Solution of the question
Description : The radius of a spherical balloon increases from 7cm to 14cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases. -Maths 9th
Last Answer : Let r1 and r2 be the radii of spherical balloon and spherical balloon when air is pumped into it respectively. So r1 = 7cm r2 = 14 cm Now, Required ratio = (initial surface area)/(Surface area after pumping air into ... = (7/14)2 = (1/2)2 = ¼ Therefore, the ratio between the surface areas is 1:4.
Description : The radius of a spherical balloon increases from 6 cm to 12 cm as air is being pumped into it. -Maths 9th
Last Answer : Surface area of a spherical balloon whose radius is 6 cm. = 4π × 6 × 6 cm2 Surface area of a spherical balloon whose radius is 12 cm. = 4π × 12 × 12 cm2 ∴ Ration of surface areas = 4π × 6 × 6 / 4π × 12 × 12 = 1 / 4 = 1 : 4
Description : A spherical ball is divided into two equal halves. If the curved surface area of each half is 56.57 cm?, find the volume of the spherical ball.11531/cylinder-radius-halved-and-height-doubled-then-find-volume-with-respect-original-volume -Maths 9th
Last Answer : since curved surface of half of the spherical ball = 56.57 cm2 ∴ 2πr2 = 56.57 ⇒ r2 = 56.57 / 2 × 3.14 = 9 ⇒ r = 3 cm Now, volume of spherical ball = 4 / 3 πr3 = 4 / 3 × 3.14 × 3 × 3 × 3 = 113.04 cm3
Description : Find the amount of water displaced by a solid spherical ball of diameter 4.2 cm, when it is completely immersed in water. -Maths 9th
Last Answer : The amount of water displaced by a solid spherical ball when it is completely immersed in water is equal to its volume. Volume of a sphere of radius r is 34πr3 As the diameter of the ball is 4.2 cm, its radius r=2.1 cm Hence, volume of water displaced =34πr3=34×722×2.1×2.1×2.1=38.808 cm3
Last Answer : Solution of this question
Description : The radius of a spherical balloon increases -Maths 9th
Last Answer : Radius of the spherical balloon = r1 = 7 cm Surface area s1 of the balloon = 4 πr12 = 4 x 22/7 x 72 = 616 cm2 Radius of the spherical balloon when air is pumped into it = r2 = 14 cm Surface area S2 of the balloon = 4 πr22 = 4 x ... S 1/S 2 = 4 x 22/7 x 7 2/4 x 22/7 x14 2 = 1/4 ∴ S1 : S2 = 1 : 4
Description : A cylindrical rod of iron whose height is eight times its radius is melted and cast into spherical balls each of half the radius of the cylinder. -Maths 9th
Last Answer : Let radius of iron rod = r ∴∴ Height = 8r ∴∴ Volume of iron rod =π×(r)2×8r⇒8πr3=π×(r)2×8r⇒8πr3 ⇒⇒ Radius of spherical ball =r2=r2 Volume of spherical ball =43π(r2)3=43π(r2)3 Let n balls are casted ∴n×43π(r38)=8πr3∴n×43π(r38)=8πr3 ⇒n6=8⇒n=48
Description : A cylindrical rod of iron whose radius is one-fourth of its height is melted and cast into spherical balls of the same radius as that of the cylinder. -Maths 9th
Last Answer : Let radius of cylindrical rod =r ⇒ height =4r Volume of cylindrical rod =πr2h =πr2(4r) =4πr3 Volume of spherical balls of radius r=34πr3 No. of balls =34πr34πr3=
Description : A spherical metal of radius 10 cm is melted and made into 1000 smaller spheres of equal sizes. In this process the surface area of the -Maths 9th
Last Answer : Option (C) is correct. Solution: Let the radius of the small spheres be r' cm. Volume of metal remains the same in both cases. So, vol of the spherical metal of radius 10 cm = total ... Total Surface area of 1000 smaller spheres: 1000*4π12 = 4000π Hence, the surface area increased by 10 times.
Description : A spherical iron shell with external diameter 21 cm weighs 22775 x 5/21 grams. Find the thickness of the shell if the metal weighs 10 gms per cu cm. -Maths 9th
Last Answer : answer:
Description : A pet shop owner had a parrot with a sign on its cage that said 'Parrot repeats everything it hears'. Davey bought the parrot and for two weeks he spoke to it and it didn't say a word. He returned the parrot but the shopkeeper said he never lied about the parrot.How can this be? -Riddles
Last Answer : The parrot was deaf.
Description : A pet shop owner had a parrot with a sign on its cage that said 'Parrot repeats everything it hears.' A young man bought the parrot and for two weeks he spoke to it and it didn't say a word. He returned the parrot but the shopkeeper said he never lied about the parrot. How can this be? -Riddles
Last Answer : The parrot was deaf!
Description : A shopkeeper insists that you buy a guide with your NCERT Textbook. Which right of the consumer is being violated here ? -SST 10th
Last Answer : If the shopkeeper insists on selling the NCERT textbook only with a guide, the right to choose is being violated.
Description : A shopkeeper insists that you buy a guide with your NCERT Textbook. -SST 10th
Description : If you are interested to buy a brush with toothpaste but shopkeeper denied selling toothpaste only. -SST 10th
Last Answer : In this case Right to choose is being violated by the seller.
Description : What does the word Shopkeeper mean ?
Last Answer : The word shopkeeper means shopkeeper.
Description : Can product be returned due to fault ? When you go to buy something from the store, the shopkeeper sometimes says , look at what you see now. Can't return later due to any problem. Having said that, if there is any defect in the product, will there be any right to refund ?
Last Answer : : If the seller buys the product after the seller has said the question in question, then he will not have the right to return the product due to any fault in the future. It is revealed that taking back the ... ; Kitabul Asal 2/47 ; Mabsut , Sarakhsi 13/91 ; Albahroor Rayek 6/7 ; Raddul Muhtar 5/42
Description : A shopkeeper sold certain articles. Cost price of each article and the number of articles sold are given below. Calculate the cost of libing index for
Last Answer : A shopkeeper sold certain articles. Cost price of each article and the number of articles sold are ... taking 1999 as the base year (approximately).
Description : Assertion (A): Mohan is a shopkeeper who pays his taxes on time. He has employed two workers Raghu and Rakesh in his shop. He pays them well but none of the workers get paid leaves in a year. Reason (R): Rakesh ... correct explanation of A. (c) A is true but R is false. (d) Both A & R are false.
Last Answer : (a) Both A & R are true and R is the correct explanation of A
Description : A shopkeeper declares that he sells rice at the cost price. However he uses a weight of 425 grams. Instead of 500 grams, what is his percentage of profit? a) a) 16 5/6 b) 15 c) c) 20 7/23 d) 25 e) None of these
Last Answer : % profit = Loss/Actual Weight x 100 = 500 – 425/500 × 100 = 75/500 x 100 = 15% Answer: b)
Description : A shopkeeper marked a suit at Rs.400. He sold it after allowing a discount, and still made at a profit of 25%. At what percentage above its cost price did he marked the suit, if he sold it for Rs.320? a)50% b)66 2/3% c)62 1/2% d)56 1/4%
Last Answer : d)56 1/4%
Description : A shopkeeper sold a toothpaste at a profit of 12.5%. His cost price was Rs.5 less than his selling price. find his cost price (in Rs.) a)30 b)36 c)40 d)50
Last Answer : c)40
Description : A shopkeeper gives 12% additional discount on the discounted price, after giving an initial discount of 20% on the labeled price of a mobile. If the final sale price of the mobile is 704. then what is its labelled price? A. Rs 844 B. Rs 920 C. Rs 1000 D. Rs 1100
Last Answer : Answer – C. Rs 1000 Explanation – Let the labeled price be Rs. x 88% of 80% of x = 704 => x = (704 x 100 x 100/88 x 80)= 1000.
Description : The sale price of an article including the sale tax is Rs. 616. The rate of sale tax is 10% . If the shopkeeper has made a profit of 12%, the cost price of the article is [The Pearson Guide book] A. Rs 500 B. Rs 515 C. Rs 550 D. Rs 600
Last Answer : Answer – A. Rs 500 Explanation – 110% of S.P. = 616 = S.P. = Rs.(616 x 100/110) = Rs.560. C.P. = Rs (100/112 x 560) = Rs 500
Description : Harshika wants to purchase a mobile handset. The shopkeepers told her to pay 30% tax if she asked for the actual sale price (without tax) of the mobile and paid to the shopkeeper Rs. 16150. In the doing so, she managed to avoid ... tax)? 1. Rs. 5495 2. Rs. 5850 3. Rs. 5950 4. Rs. 5685 5. Rs. 5975
Last Answer : 3; SP = 100, SP (with tax) = 130 New SP = 100 - 5 = 95 Effective discount = 130 - 95 = 35 So, when SP of 95, discount = 35 And when SP of Rs. 16,150, discount = 35/95x16150 = Rs. 5950
Description : By selling a telephone for Rs. 2400, a shopkeeper make a profit of 25%. Then, his profit percentage, if he had sold it for Rs. 2016, is ? (a) 10% (b) 6.25% (c) 6.5% (d) 5% (e) 12%
Last Answer : (d) 5%
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 : A shopkeeper sells two watches for Rs 308 each. On one watch he earns 12% profit and on the others he suffers 12% loss. His profit or loss in the entire transaction was: 1. 1(11/25)% loss 2. 1(11/25)% gain 3. 3(2/25)% loss 4. 3(2/25)% gain
Last Answer : 3. 3(2/25)% loss
Description : .A shopkeeper sells two watches for Rs 308 each. On one watch he earns 12% profit and on the others he suffers 12% loss. His profit or loss in the entire transaction was: 1. 1(11/25)% loss 2. 1(11/25)% gain 3. 3(2/25)% loss 4. 3(2/25)% gain
Last Answer : . 3(2/25)% loss
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 : Which one of the following falls into the category of offer? (a) Newspaper advertisement regarding sale. (b) Display of goods by a shopkeeper in his window with prices marked on them (c) An advertisement for a concert. (d) Announcement of reward to the public.
Last Answer : (d) Announcement of reward to the public.
Description : Ali buys a glass, a pencil box and a cup and pays Rs. 21 to the shopkeeper. Rakesh buys a cup, two pencil boxes and a glass and pays Rs. 28 to the shopkeeper. Preeti buys two glasses, a cup and two pencil boxes and pays Rs ... The cost of 10 cups will be (A) Rs. 40 (B) Rs. 60 (C) Rs. 80 (D) Rs. 70
Last Answer : Answer: D
Description : Mani went to purchase a mi mobile handset, the shopkeeper told him to pay 25% tax if he asked the bill. Mani manages to get the discount of 10% on the actual saleprice of the mobile and he paid ... to pay 25% tax on the already discounted price, what is the amount of discount that he has gotten?
Last Answer : CP = 100, SP (with tax) =125 New SP = 100 - 10 = 90 Effective discount = 125-90 = 35 So, at SP of 90 ----> discount = 35 and at SP of 3275-----> discount = 35/90*3275= Rs 1274(approx.)
Description : A shopkeeper sells speaker at the rate of Rs 914each and earns the commission of 4%. He also sells phones at the rate of Rs 160each and earns a commission of 20%. How much amount of commission will he earn in two weeks if he sells 20 speaker and 12phones per day?
Last Answer : Sp of modem=Rs 914 Commission of one speaker =4*914/100 Commission of 20 speakers = 4*914*20/100=Rs 731.2 Commission of one phone = 20*160/100 Commission of 12 phones = 20*160*12/100=384 Total ... 384) = 1115.2 The amount of commission will he earn in 2 weeks = 1115.2*14= Rs 15,612.8
Description : By mixing two brands of dal and selling the mixture at the rate of Rs.354 per kg a shopkeeper makes a profit of 36%. If to every 4 kg of one brand costing Rs.400 per kg, 6kg of other brand is added. Then how much per kg does the other brand cost?
Last Answer : Let the cost price of other brand be Rs x' per kg cost price of 10 kg = Rs (4 * 400 + 6 * x) = Rs (1600 +6x) Selling price of 10 kg = Rs (10 * 354 ) = Rs.3540 Therefore 3540 -(1600 + 6x)/ ... 6x/1600 + 6x = 0.36 1940 - 6x = 576 + 2.16x x=167.15 so the cost of other brand = Rs.167.15
Description : A shopkeeper sells a cricket bat whose marked price is Rs.60 at a discount of 20% and gives a ball costing Rs.3 free with each bat. Even then he makes a profit of 25%. His cost per bat is.
Last Answer : Marked price = Rs.60 Selling price = Rs [(80/100 * 60) – 3] = Rs.45 Let cost price brRs ‘x’. Then 125% of x = 45 (125/100 * x) = 45 Cost price of one bat = Rs.36
Description : A shopkeeper announced 35% discount on an item. A customer bought the item from the shop for Rs. 21000 after getting discount. That person sells the item to another person in such a way that he earned a profit of 32% on the original price. What is the selling price for the another person?
Last Answer : Let original price=x X*65/100=21000 X=21000*100/65=32307.6Rs. SP=32307.6*132/100=Rs.42646.15
Description : After selling a fan at 6% gain and a fridge at 9% gain, a shopkeeper gains Rs 5100. But if he sells the fan at 9% gain and the fridge at 6% loss, he gains Rs 1800 on the whole transaction. Find the original price of the fan.
Last Answer : let the price of fan be X and fridge be Y 6x/100+9y/100 = 5100 6x+9y=510000------(1) then 9x/100-6y/100=1800 9x-6y=180000-------(2) Calculate both, the we will get x=Rs40000
Description : In what ratio should a shopkeeper mix two types of rice, one costing 40 rupees/kg and another costing 20 rupees/kg to get a rice variety costing 28 rupees/kg a) 3:2 b) 2:3 c) 4:3 d) 2:7 e) None
Last Answer : B Here also we can use Alligation as follows X = 40-28 = 4 ; y = 28-20 = 8 The ratio between the type 1 and type 2 rice is 4:6 or 2: 3
Description : An shopkeeper has 15 models of cup and 9 models of saucer. In how many ways can he make a pair of cup and saucer? A) 100 B) 80 C) 110 D) 135
Last Answer : Answer: D) He has 15 patterns of cup and 9 model of saucer A cup can be selected in 15 ways. A saucer can be selected in 9 ways. Hence one cup and one saucer can be selected in 15×9 ways =135 ways
Description : A shopkeeper bought 1800 blackberry and 1200 blueberry. He found 45% of blackberry and 24% of blueberry were rotten. Find the percentage of fruits in good condition. a) 63.4 b) 32.9 c) 48.5 d) 56.3
Last Answer : Answer: A Total number of fruits shopkeeper bought = 1800 + 1200 = 1000 Number of rotten blackberry = 45% of 1800 = 45/100 1800 = 81000/100 = 810 Number of rotten blueberry = 24% of 1200 ... Therefore Percentage of fruits in good condition = (1902/3000 100) = (190200/3000) = 63.4%
Description : The Shopkeeper increased the price of a product by 75% so that customer finds it difficult to purchase the required amount. But somehow the customer managed to purchase only 140% of the required amount. What is the net difference in the ... on that product? a) 12.5 b) 26.0 c) 13.5 d) 17.5 e) 19.8
Last Answer : Answer: D Quantity×Rate=Price 1x1=1 1.4x1.75=2.45 Decrease in price = (0.175/1) × 100 = 17.5%
Description : the curved surface area of a cylinder is 154 cm. the total surface area of the cylinder is three times its curved surface area. find the volume of the cylinder. -Maths 9th
Last Answer : T.S.A = 3*154 = 462 cm² C.S.A = 154 cm² C.S.A = 2πrh T.S.A = 2πr(r+h) Now, In T.S.A = 2πrr + 2πrh 462 = 2πrr + 2πrh 462 = 2*22/7*r*r + 154 462 - 154 = 2*22/7*r*r 308*7/2*22 = r*r 49 = r*r R = 7 cm ... 7*h 154/44 = h 7/2 =h H = 3.5 cm or 7/2 cm Now volume = πrrh = 22/7 * 7* 7 *7/2 = 11*49 = 539 cm³
Description : case study questions class 9 maths surface area and volume -Maths 9th
Last Answer : Q. Read the source or text given below and answer the following questions: A conical circus tent has to be made with a cloth that is 5m wide, whose height is 24m, and the radius of the base is 7m. ... 4. Find the Curved Surface Area Answers: 1. Curved Surface Area 2. 550 m 3. Rs.3850 4.110m²