Question

A vaccum cleaner utilizes 36kJ of energy in half hour.what is it's power?

Answer 1

36 kj given energy

so, total energy in joules will be=36000

now power = work/time

given time=30 mins=30*60=1800 secs

power=36000/1800=20 j/s

Answer 2

We know that

Power=Work/Time

Power=36.1000/1200

36000/1800

20 watt

Hope it helps