Question

Calcute power of motor of pump 200 litre of water in 4 min from a well 80m deep ( g= 10m/s)

Answer 1

$\Longrightarrow{\boxed{\bold{Answer\::\:666.7\:Watt}}}$

$\textbf{\underline{Step-by-step explanation :- }}$

$\textbf{\textit{Since we know that,}}$

1 kg = 1 liter

200 l = 200 kg

Since, Power = Workdone / Time

$\textsf{Work done = F s while F = mg}$

Power = ( mg × s )/ t

Now, 1 min = 60s

So, 4 min = 4 × 60 s = 240 s

Power = ( 200 kg × 10 m/s² × 80 m )/ 240

Power = 160000 J /240 s

$\textbf{\underline{Power = 666.7 W or 0.7 kW}}$