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Question

Pipes 'X' and 'Y' together can fill a tank in 30 minutes, while Pipe 'X' alone can fill the tank in 50 minutes. Another pipe 'Z' can empty the fully filled tank in 100 minutes. Find the time taken by pipes 'Y' and 'Z' together to fill 60% of the same tank.

A 125 min

B 180 min

C 145 min

D 110 min

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SSC CHSL

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