Question

8. A pump is used to lift 500 kg of water from a depth
of 80 m in 10 s. Calculate :
(a) the work done by the pump,
(b) the power at which the pump works, and
(c) the power rating of the pump if its efficiency is
40%. (Take 8 =
= 10 m s-2)
useful power
[Hint : Efficiency=
power input
Ans. (a) 4 10%J (b) 40 kW (c) 100 kW​

Answer 1

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