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Water is pumped out of a well 10 m deep ...

Water is pumped out of a well 10 m deep by means of a pump rated 10 KW. Find the efficiency of the motor if 4200 kg of water is pumped out every minute.`" Take" g = 10 m/s2`

Text Solution

Verified by Experts

`"Input power"=10KW`
`"ouptput power"=W/t=(mgh)/t=7KW`
`therefore "Efficiency"("output power")/("Input power")xx100=70%`
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