A 1 kW motor lifts 2000 litres of water to a second-floor (20 m) rooftop tank in 10 minutes. The gravitational potential

Question

A 1 kW motor lifts 2000 litres of water to a second-floor (20 m) rooftop tank in 10 minutes. The gravitational potential energy gained by the water is approximately—

Accepted Answer

$3.92 	imes 10^{5}$ J

Answer

$3.92 	imes 10^{4}$ J

Answer

$1.96 	imes 10^{5}$ J

Answer

$7.84 	imes 10^{5}$ J