Question

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

Answer 1

power=work/time
work=720*10*15=108000
time=30min=1800sec
$so \: power = \frac{108000}{1800} \\ so \: power = 60watt$
I HOPE IT WILL HELP YOU.

Answer 2

Answer:

The power of the pump is 60 watt.

Explanation:

Given that,

Mass of engine m = 720 kg

Height h = 15 m

Time t = 30 min=1800 s

We know that,

The work is the stored potential energy.

The potential energy is

$P.E = mgh$

$P.E=720\times9.8\times15$

$P.E= 105840\ J$

The power is

$P = \dfrac{w}{t}$

$P = \dfrac{105840}{1800}$

$P = 58.8\ watt$

$P=60\ watt$   approximate

Hence, The power of the pump is 60 watt.