How much time will a pump of 1 kW power takes to lift 500 kg of water to height of 40 m? (Take, g = 10 ${{ms}^{2}}$
Given mass,m = 500kg
Heighyt, h = 40 m
P = 1 kw= 1000W ,t=?
Now,power = p= mgh / t
1000 = 500 x 10 x 40 / t
Time, t = 500 x 10 x 40 /1000 = 200s = 3 min 20 s