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If m men can do a work in r days, then t...

If m men can do a work in r days, then the number of days taken by `(m+n)` men to do it is :

A

` ( m+ n)/( mn)`

B

`( m + n)/( mr)`

C

`( mr)/( (m+n))`

D

`((m+n) r)/(mn)`

Text Solution

Verified by Experts

The correct Answer is:
C
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DISHA PUBLICATION-TIME AND WORK-Practice Exercise (Foundation Level)
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  5. Mayank can do 50% more work than Shishu in the same time. Shishu alone...

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  14. There is sufficient food for 400 men for 31 days. After 28 days, 280 m...

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  16. 12 men and 16 boys can do a piece of work in 5 days, 13 men and 24 boy...

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  17. Two taps can fill a tank in 12 and 18 minutes respectively. Both are k...

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  18. A cistern normally takes 6 hours to be filled by a tap but because of ...

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  19. If 3 men or 4 women can reap a field in 43 days, how long will 7 men a...

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  20. If m men can do a work in r days, then the number of days taken by (m+...

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