Question

2 bulb of 40W each are lighted for 8 hours daily. find the cost of the electrical energy consumed by them in 1 week at RS 3 per unit.

Answer 1

The is equal 21×16/25

Answer 2

Hey mate here is ur answer

hope it's help u

energy = p×t

time = 8×7 =56

= 2×40×56
= 4.480 kWh

1kWh costs = rs3

4.480kWh costs = 4.480×3 = 13.44rs