An engine develops 20 kW of power. How m...

An engine develops 20 kW of power. How much tie will it take to lift a mass of 400 kg to a height lf m? `(g=10 ms^(-2))`

A

`4s`

B

`5s`

C

`8s`

D

`10s`

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The correct Answer is:

C

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