Question

b)A family uses five 40W bulbs daily for 5 hours, calculate energy consumed
in 20 days.
c) If one unit of electrical energy costs Rupees 5/-, what is the cost of the
electricity bill for 20 days?

Answer 1

B) energy =power × time ×number of days
= 40×5×20
=4000 wh
c) cost =4000× 5
= 20,000