Question

Calculate the electricity bill amount for a month of 31 days,if the following device are used as specified:

a: 4 bulbs of 50 W for 6hrs

b: 2 tu elights of 60W forc10 hrs.

Answer 1

Power of 4 bulbs = 200 w = 0.2 Kw

Power of 2 tube lights = 120 w = 0.12 Kw

Energy consumed by 4 bulbs for 6 hrs = 0.2 Kw x 6 Hrs = 1.2 KwH

Energy consumed by 2 tube lights for 10 hrs = 0.12 Kw x 10 Hrs = 1.2 KwH

Total energy = 1.2 KwH + 1.2 KwH = 2.4 KwH

Electricity bill for 31 days = 2.4 KwH x 31 x cost of each unit

                                          = 74.4 x cost of each unit.

Note:

cost of each unit didn't give in this question