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C is twice efficient as A. B takes thric...

C is twice efficient as A. B takes thrice as many days as C. A takes 12 days to finish the work alone. If they work in pairs (ie, AB, BC, CA) starting with AB on the first day then BC on the second day and AC on the third day and so on, then how many days are required to finish the work?

A

`6 (1)/(5)` days

B

4.5 days

C

`5 (1)/(9)` days

D

8 days

Text Solution

Verified by Experts

The correct Answer is:
C
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DISHA PUBLICATION-TIME AND WORK-Practice Exercise (Expert Level)
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  2. The work done by 4 men in 12 days is equal to the work done by 6 women...

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  3. C is twice efficient as A. B takes thrice as many days as C. A takes 1...

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  4. There was a leakage in the container of the refined oil. If 11 kg oil ...

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  5. According to a plan, a drilling team had to drill to a depth of 270 me...

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  6. Simplify:- (36% of 630) ÷ 1.4 =?

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  7. B and C are equally efficient, but the efficiency of-A is half of each...

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  8. A finishes 6/7th of the work in 2z hours, B works twice as fast A and ...

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  9. 4 men and 2 boys can finish a piece of work in 5 days. 3 women and 4 b...

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  10. The work done by 2 men in a day is equal to the work done by 3 childre...

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  11. It takes 30 hours for an inlet pipe to fill an empty tank completely. ...

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  12. A tank of capacity 25 litres has an inlet and an outlet tap. If both a...

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  13. Ashish, Binay and Joseph can do a job in 20, 30 and 40 days respective...

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  14. Pawan and Qureshi working together can do a piece of work in 10 days w...

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  15. Three cooks have to make 80 idlis. They are known to make 20 pieces ev...

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  16. A cistern has a leak which would empty it in 6 hours. A tap is turned ...

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  17. Tap A can fill a tank in 20 hours, B in 25 hours but tap C can J empty...

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  18. Each of A, B and C need a certain unique time to do a certain work. C ...

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  19. Two men and a woman are entrusted with a task. The second man needs th...

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  20. Two pipes A and B can fill a cistern in 15 hours and ’10 hours respect...

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