Question

Find the mass of water lifted by a pump in two minute up to a height of 5 meter if power of pump is 600 watt

Answer 1

Power = mgh / t

m/t = Power / (gh)
= 600 Watt / (10 m/s² × 5 m)
= 12 kg/s

12 kg of water is being pumped in 1 second

In 2 minutes (= 120 seconds)
Water pumped = 12 kg × 120 = 1440 kg

∴ 1440 kg (= 1.44 tonnes) of water is pumped by motor in 2 minutes.