There are two taps to fill the tank in 8 hours A leakage in the bottom of the tank can drain the wat...........

Quantitative Aptitude (CDS) Pipes&cistern

There are two taps to fill the tank in 8 hours. A leakage in the bottom of the tank can drain the water in 15 hours. Tap A fill it 10 hours. Find the time to fill the tank by tap B?

120 hours

120/11 hours

111/5 hours

18 hours

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Explanation:

Tank filled in 8 hours
Tap A filled in 10 hours
Leakage drain the tank in 15 hours
8(1/10 + 1/B -1 /15) =1
8/30 +8/B = 1
22/30 =8/B
B=30×8/22
B=120/11 hours