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If x men can do a work in z days. Then, ...

If x men can do a work in z days. Then, the number of days taken by (x + y) men to do this is

A

`(xy)/( (x + z))`

B

`( xz)/( (x + y))`

C

`( z ( x + y ) )/( x )`

D

`( x ( x + y ) )/( z )`

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The correct Answer is:
B
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