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

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

1.	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.	r(m +n)/mn
Answer» D. r(m +n)/mn

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

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