Question

an electric bulb marked 60 watt is used for 5 hours in a week what is the cost of electricity if the rate is rupees 3 per unit​

Answer 1

hey the answer is ....

energy = power × time

= 60 watt × 5hrs

= 300 joules

units = 300/1000 = 0.3kwh


cost = 0.3 × 3

= 0.9$

Answer 2

P=60W

T=5H

W=P*T

W=60*5

W=300KWH

Total Cost=300*3=RUPEES 900