A tank is filled up in 6 hours by three pipes X, Y and Z together. If Z is thrice as fast as Y and Y is twice as fast as X then find the time required in hours to fill up the tank by pipe X alone?

A tank is filled up in 6 hours by three pipes X, Y and Z together. If

1.	A tank is filled up in 6 hours by three pipes X, Y and Z together. If Z is thrice as fast as Y and Y is twice as fast as X then find the time required in hours to fill up the tank by pipe X alone?
A.	30 hours
B.	54 hours
C.	27 hours
D.	45 hours
Answer» C. 27 hours

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A tank is filled up in 6 hours by three pipes X, Y and Z together. If Z is thrice as fast as Y and Y is twice as fast as X then find the time required in hours to fill up the tank by pipe X alone?

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