Question

Calculate the electricity bill amount for a month of 30 days, if the following devices are used as
specified :
a) 5 bulbs of 60W for 6hrs
b) 6 tube lights of 40 W for 8 hrs
c) A T.V. of 100 W for 4 hrs
d) 2 refrigerators of 620 W for 24 hrs
( the cost per unit is Rs 3.50 )
pls answer

Answer 1

Answer:

Electric energy consumed per day by 4 bulbs = 4x40 x5 = 800Wh

Electric energy consumed per day by 4 lights = 4x60x5 =1200 Wh

Electric energy consumed per day by TV = 100x6 = 600 Wh

Electric energy consumed per day by washing machine = 400x3 =1200 Wh

.’. Total electric energy consumed by all electric appliances = (800+ 1200 + 600+ 1200)Wh = 3800 Wh = 3.8 kWh =3.8 units

Total electric energy consumed in the month of April (30 days) = 3.8 x 30 = 114units

Cost of one unit = Rs. 1.80

Cost of 114 units = 114 x 1.80 = X 205.20 .:. Electricity bill amount = Rs 205.20

Explanation:

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