Pipe P is 4 times as fast as Q in filling a tank If P takes 20 minutes to fill a tank then what is t...........

Quantitative Aptitude ( CCS) Pipes&cistern

Pipe P is 4 times as fast as Q in filling a tank. If P takes 20 minutes to fill a tank, then what is the time taken by both the pipe P and Q to fill the tank?

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Explanation:

Answer & Explanation
Answer – b) 16
Explanation :
P takes 20 minutes and it is 4 times faster than Q, it means Q will take 80 minutes to fill the tank.
(1/20 + 1/80)*t = 1. We get t = 16