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CBSE Class 11-science Answered

A pump on the ground floor of a building can pump up water to fill a tank of volume 30 cubic metres in 15 min.If the tank is 40m above the ground and the efficiency of the pump is 30%,how much electric power is consumed by the pump?
Asked by sudipt.kumar | 09 Oct, 2010, 11:29: AM
answered-by-expert Expert Answer
density of water 1 m3 = 1000 kg
therefore 30 m3 of water = 30 * 1000 kg of water =m
 height h = 40m
time t= 15 * 60 sec
efficiency of pump = 30% = 3/10
putting the values we get EP = 4.36*104 watts
Answered by | 09 Oct, 2010, 01:45: PM

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