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A pump on the ground floor of a building can pump up water to fill a tank of volume 30m^3 in 15 min.

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asked Feb 23, 2018 in Physics by paayal (26,720 points) ● 4 ● 6 ● 47

A pump on the ground floor of a building can pump up water to fill a tank of volume 30m3 in 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, how much electric power is consumed by the pump?

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answered Feb 23, 2018 by Vikash Kumar (144,729 points) ● 8 ● 11 ● 24
 
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 Volume of the tank, V = 30 m3
Time of operation, t = 15 min = 15 × 60 = 900 s

For input power Pi, efficiency η, is given by the relation:

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