Question

An engine pumps 720 kg of water through height
of 15 m in half hour. The power of pump is​

Answer 1

• Mass, m = 720 kg
• Height, h = 15 m
• Time, t = 30 mins = 30 * 60 = 1800 secs
• Acceleration due to gravity, g = 10 m/s²

As we know,

$\blacksquare$ Power, P = mgh/t

Putting the values :-

$\rm{\hookrightarrow P=\dfrac{720\times10\times15}{1800} }\\\\\rm{\hookrightarrow P=\dfrac{108000}{1800} }\\\\\rm{\hookrightarrow P=\dfrac{1080}{18} }\\\\\boxed{\boxed{\rm{\hookrightarrow P=60\ W}}}$

Hence, the power of the pump is 60 W.