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What is the power of a pump which can pu...

What is the power of a pump which can pump 300 kg of water to the terrace of a building of height 20m, in 10s?

A

4kW

B

5kW

C

6kW

D

8kW

Text Solution

Verified by Experts

The correct Answer is:
C
Work done = Increase in K.E.
`=(1)/(2)m(v^(2)-u^(2))=(1)/(2)mv^(2)`
`therefore W=(1)/(2)xx1000xx100=500xx100=5xx10^(4)J`
`therefore` Power `=(W)/(t)=(5xx10^(4))/(5)=10^(4)` watt
But 1 H.P. = 746 watt
`therefore` Required horse power `=(10^(4))/(746)`
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