An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of `2 ms^(1)`. The mass per unit length of water in the pipe is `100 kgm^(-1)`. What is the power of the engine?

Options

A. 400 W
B. 200 W
C. 100 W
D. 800 W

Answer

`(4)`

Explanation

Here, Mass per unit length of water,
`mu = 100 kg/m`
Velocity of water ,` v = 2 m/s`
Power of the engine, `P = mu v^(3)`
` = (100 kg/ m)(2m /s)^(3)`
` = 800 W`