An engine pumps up 100 kg of water through a height of 10m in 5s. Given that the efficiency of the engine is 60%, What is the power of the engine             ( Take g= 10ms-2)

Power used to pump the water =  mght=100×10×105                                         Power   =2000W  given efficiency = 60% ⇒60% Power of engine=2000 watt ⇒60100Power of engine=2000 watt ⇒Power of engine=2000×10060=3.3kW