Question

find the energy in kWh consumed in 10hrs by 4 devices of power 500w each

Answer 1

Yeah there you made mistake in the previous question .

It is 500 W in the question not 5000W

This gonna surely help you !

Answer 2

given ,
energy =?
power =500w =0.5kw
time =10hrs
$power = watt \div time$
or
$power = energy \div time$