X, Y and Z can complete a piece of work ...

X, Y and Z can complete a piece of work in 8, 20 and 25 days respectively. Working together, they will complete the same work in:

A

`(180)/(43)` days

B

`(162)/(43)` days

C

`(200)/(43)` days

D

`(172)/(43)` days

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The correct Answer is:

C

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