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A can do in one day three times the work...

A can do in one day three times the work done by B in one day. They together finish `2/5` of the work in 9 days. The number of days by which B can do the work alone is a. `30\ d a y s` b. `90\ d a y s` c. `100\ d a y s` d. `120\ d a y s`

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RS AGGARWAL-TIME AND WORK-All Questions
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  3. 16 men can finish a work in 24 days and 48 boys can finish the same...

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  4. 12 men can complete a piece of work in 4 days, while 15 women can comp...

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  5. Twelve children take sixteen days to complete a work which can be c...

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  6. Twenty-four men can complete a work in sixteen days.Thirty-two women c...

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  7. 5 men and 2 boys working together can do four times as much work as...

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  8. If 12 men and 16 boys can do a piece of work in 5 days; 13 men and ...

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  9. 4 men and 6 women can complete a work in 8 days, While 3 men and 7 wom...

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  11. one man , 3 woman and 4 boys can do a work in 96 hours . 2 man and 8 b...

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  13. If 5 men and 3 women can reap 18 acre of crop in 4 days; 3 men and ...

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  14. 25 men with 10 boys can do in 6 days as much work as 21 men with 30...

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  15. 40 men can complete a piece of work in 15 days. 20 more men join the...

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  16. 12 men can do a piece of work in 24 days. How many days are needed ...

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  18. A, B and C can complete a piece of work in 24, 5 and 12 days respec...

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  19. X can do a piece of work in 24 days. When he had worked for 4 days,...

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  20. 6 men can complete a piece of work in 12 days, 8 women can complete...

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