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))`

An engine develops 20 kW of power. How much time will it take to lift a mass of 400 kg to a height of 40 m? (g=10 ms^(-2))

An engine develops 10 kW power. How much time will it take to lift a mass of 200 kg to a height of 40 m ?

An engine develops 10 KW of power. How much time will it take to lift a mass of 200 kg to height of 40 m (g=10 m//s^2)

An engine develops 10 kW of power. How much time will it take to lift a mass of 200 kg to a height of 40 m ( g=10(m)/(sec^2) ) ?