Rubika can do the 12 times the actual work in 72 days while sathya can do the one-half of the original work in 6 days. In how many days will both working together complete the 6 times of the original work? a) 20 days b) 25 days c) 30 days d) 35 days

Rubika can do the 12 times the actual work in 72 days while sathya can do the one-half of the original work in 6 days. In how many days will both working together complete the 6 times of the original work? a) 20 days b) 25 days c) 30 days d) 35 days
by

1 Answer

Answer :

 C

Efficiency of Rubika = 16.666%

Efficiency of sathya = 4.166%

Total efficiency of rubika and sathya =(16+4) =20%

Actual work 100/20=5

So, they can do actual work in 5 days

So, 6 times work requires 30 days.
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Related questions

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Last Answer : B Ratio of number of male, female and children =36/6:20/5:24/3 = 6x:4x:8x So, (6x + 4x + 8x) = 72 18x=72 X=72/18=4 So, x = 4 Therefore, number of female = 16 Share of all female =20/80*16000 =Rs 4000 So, Share of each female = 4000/4 = Rs 1000

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Description : St at ement I : Shifting cultivation was widely prevalent in different parts of India in the 19th century. St at ement I I : More and more people took to shifting cultivation when forest laws were enacted.

Last Answer : 1. Statement I is true, Statement II is false.

St at em ent I : The Forest Act of 1878 categorized some forests as ‘reserved forests'. Statement I I : They were considered the best forests for people's use.

Description : St at em ent I : The Forest Act of 1878 categorized some forests as ‘reserved forests'. Statement I I : They were considered the best forests for people's use.

Last Answer : 1. Statement I is true, Statement II is false.

St at ement I : During the years of the Great Depression the economic crisis was worse in Germany. St at em en t I I : The President of the Weimar Republic had the power to impose emergency.

Description : St at ement I : During the years of the Great Depression the economic crisis was worse in Germany. St at em en t I I : The President of the Weimar Republic had the power to impose emergency.

Last Answer : 4. Both Statements are true, but Statement II does not provide explanation of Statement I.

Which of the following statements are correct? I. In the beginning Bombay was under the Portuguese control. II. Control of Bombay passed onto the French in the 17th century. III. The Marathas replaced the French in Bombay. IV. Bombay became the capital of the Presidency in early 19th century. (1) I, II and IV (2) I and IV (3) I, II and III (4) II, III and IV

Description : Which of the following statements are correct? I. In the beginning Bombay was under the Portuguese control. II. Control of Bombay passed onto the French in the 17th century. III. The Marathas replaced the French in Bombay. IV. Bombay ... , II and IV (2) I and IV (3) I, II and III (4) II, III and IV

Last Answer : (2) I and IV

Which of the following statements about Liberals in 19th century Europe are correct? I. They favoured the Catholic Church. II. They opposed dynastic rule with unlimited power. III. They were democrats. IV. They did not want any voting rights for women. (1) I, II and III (2) I, II and IV (3) II and IV (4) III and IV

Description : Which of the following statements about Liberals in 19th century Europe are correct? I. They favoured the Catholic Church. II. They opposed dynastic rule with unlimited power. III. They were democrats. IV. They did not want any voting ... I, II and III (2) I, II and IV (3) II and IV (4) III and IV

Last Answer : (3) II and IV

. Arrange the developments related to European history in a chronological sequence. I. Napoleon invaded Italy. II. Unification of Italy. III. Unification of Germany. IV. Vienna Settlement. (1) I, III, II and IV (2) I, II, IV and III (3) I, IV, II and III (4) I, II, III and IV

Description : . Arrange the developments related to European history in a chronological sequence. I. Napoleon invaded Italy. II. Unification of Italy. III. Unification of Germany. IV. Vienna Settlement. (1) I, III, II and IV (2) I, II, IV and III (3) I, IV, II and III (4) I, II, III and IV

Last Answer : (3) I, IV, II and III

A source produces sound waves under water. Waves travel through water and then into air. Which of the following statements about the frequency (f) and the wavelength () is correct and sound passes from water to air? (1) f remains unchanged but  decreases. (2) f remains unchanged but  increases. (3)  remains unchanged but f decreases. (4)  remains unchanged but f increases.

Description : A source produces sound waves under water. Waves travel through water and then into air. Which of the following statements about the frequency (f) and the wavelength () is correct and sound passes from ... increases. (3)  remains unchanged but f decreases. (4)  remains unchanged but f increases.

Last Answer : 3)  remains unchanged but f decreases.