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If 3 men or 9 boys can finish a piece of...

If 3 men or 9 boys can finish a piece of work in 21 days, in how many days can 5 men and 6 boys together do the same piece of work? `8\ d a y s` b. `12\ d a y s` c. `14\ d a y s` d. cannot be determined e. none of these

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RS AGGARWAL-TIME AND WORK-All Questions
  1. A group of workers having equal efficiency can complete a job in 4 ...

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  2. A man, a woman and a boy can do a piece of work in 6, 9 and 18 days...

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  3. If 3 men or 9 boys can finish a piece of work in 21 days, in how ma...

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  4. 8 men can complete a piece of work in 20 days. 8 women can complete...

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  5. 18 men can complete a piece of work in 63 days. 9 women take 189 da...

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  6. 16 men can finish a work in 24 days and 48 boys can finish the same...

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  7. 12 men can complete a piece of work in 4 days, while 15 women can comp...

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

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

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  10. 5 men and 2 boys working together can do four times as much work as...

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

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  12. 4 men and 6 women can complete a work in 8 days, While 3 men and 7 wom...

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  13. 4 men and10 women were put on a work. They completed 1/3 of the wor...

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

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  15. If 6 men and 8 boys can do a piece of work in 10 days while 26 men ...

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

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  17. 25 men with 10 boys can do in 6 days as much work as 21 men with 30...

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  18. 40 men can complete a piece of work in 15 days. 20 more men join the...

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  19. 12 men can do a piece of work in 24 days. How many days are needed ...

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  20. A can do in one day three times the work done by B in one day. They to...

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