Question

The power of a water pump is kW. If $g = 10ms^{- 2}$, the amount of water it can raise in one minute to a height of 10 m is:

• A. 2000 litre
• B. 1000 litre
• C. 100 litre
• D. 1200 litre

Answer 1

Answer: (D)

1200 litre

Answer 2

$P = \frac{mgh}{t}$ or $m = \frac{p \times t}{g \times h}$

$m = \frac{2000W \times 60s}{10ms^{- 2} \times 10m} = 1200kg = 1200litre$