There are two taps in a tank. One tank is there for filling water in the tank and second is used for

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03 May 2011 Tap

There are two taps in a tank. One tank is there for filling water in the tank and second is used for ejecting water from it. The first tap can fill the tank in 8 hours whereas second tap requires 10 hours for making the tank empty. If both taps are used together, hours required for filling the complete tank will be

OPtion

1) 2
2) 8
3) 10
4) 12
5) 15
6) 18
7) 28
8) 40
9) 80
10) 96

Solution

Tank filled in one hour is (1/8)-(1/10) = 1/40
so total hours required are 40

Correct Option: 8 Best Solution (0)