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A man and a boy can do a piece of work i...

A man and a boy can do a piece of work in 24 days. If the man works alone for last 4 days, it is complete in 5 days. How long would the boy take to do it alone ?

A

120 days

B

20 days

C

80 days

D

36 days

Text Solution

Verified by Experts

The correct Answer is:
A
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S CHAND IIT JEE FOUNDATION-TIME AND WORK -Question Bank - 13(a)
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  2. A and B together can do a piece of work in 8 days. B alone can do it i...

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  3. A man and a boy can do a piece of work in 24 days. If the man works al...

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  4. A and B can do a piece of work in 30 days, while B and C can do the...

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  5. A and B can do a job together in 7 days. A is 1 3/4 times as efficient...

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  6. I can do a piece of work in 8 days, which can be done by you in 10 day...

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  7. X is twice as good as a workman as Y. X finished a piece of work in 3 ...

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  8. A can cultivate 2/5 the of a land in 6 days and B can cultivate 1/3 rd...

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  9. The time taken by 4 men to complete a job is double the time taken by ...

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  10. A , B and C can do a piece of work in 11 days, 20 days and 55 days re...

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  11. A can do a piece of work in 20 days and B in 40 days. A begins the wor...

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  12. A can complete a work in 9 days, B in 10 days and C in 15 days. B and ...

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  13. A can do a piece of work in 4 hours, B and C together in 3 hours, a...

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  14. Ram can do a piece of work in 6 days and Shyam can finish the same wor...

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  15. A is twice as fast a workman as B and together they finish a piece of ...

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  16. A does half as much work as B in one-sixth of the time.If together the...

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  17. A work could be completed in 100 days by some workers. However, due to...

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  18. A man and a boy received 800 as wages for 5 days for the work they ...

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  19. a certain number of persons can complete a piece of work in 55 days. I...

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  20. A can complete a work in 18 days, B can do the same work in half the t...

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