Question

An electric refrigerator rated 400 W is used for 8 hours a day. An electric iron box rated 750 W is used for 2 hours a day. Calculate the cost of using these appliances for 30 days, if the cost of 1 kWh is Rs. 3/-

Answer 1

Answer:

Rs 423(if Rs is your unit of money)

Explanation:

The refrigerator is rated 400W which is 0.4kW

0.4*8=3.2kWh(per day)

Iron box =1.5kWh using the same logic

3.2+1.5=4.7kWh(total in a day)

4.7*30=141kWh

If 1kWh is Rs3

141kWh=141*3

=423

Hope it helps