Question

The power of a water pump is 2 kW. If `g = 10 m//s^2,` the amount of water it can raise in 1 min to a height of 10 m is :
A. 2000 litre
B. 1000 litre
C. 100 litre
D. 1200 litre

Answer 1

(d) `P = (W)/(t) = (mgh)/(t) or m = (Pt)/(gh) = ((2000W)(60s))/((10m//s^2)(10m)) = 1200kg = 1200 litre` (as mass of 1 litre of water is kg)