A pump on the ground floor of a building...

A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m^3in 15 min. If the tank is 40 m above the ground, how much electric power is consumed by the pump. The efficiency of the pump is 30%

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The correct Answer is:

`30% "of power"=W/t=(mgh)/t=(vpgh)/t`
`(30)/(100)xxp=(vpgh)/t`
`p=43.6KW`

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