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A tank on the roof of a 20 m high buildi...

A tank on the roof of a `20 m` high building can hold `10 m^(3)` of water. The tank is to be filled form a pond on the ground in `20` minutes. If the pump has an efficiency of `60 %`, then the input power in `kW` is

A

`1.1`

B

`2 .74`

C

`5.48`

D

`7.0`

Text Solution

Verified by Experts

The correct Answer is:
B
`eta = (P_(out))/(P_(i n)) = ((mgh)//t)/(P) , (x)/(100) p = (mgh)/(t)`.
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