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Question

Calculate the electricity bill of a household for a month (having 30 days) using the following details. (An electric unit costs Rs. 3.45/-)


A
Rs. 3500
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B
Rs. 1455
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C
Rs. 1289
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D
Rs. 2797
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Solution

The correct option is D Rs. 2797
For ceiling fans, power consumption per day: 4 fans × 220 W per fan × 18 H/day = 15,840 Wh = 15.84 kWh

For LED bulbs, power consumption per day: 6 bulbs × 15 W per bulb× 12 h/day = 1,080 Wh = 1.08 kWh

For TV set, power consumption per day: 250 W × 8 h/day = 2000 Wh = 2 kWh

For stove set, power consumption per day: 1800 W × 4.5 h/day = 8100 Wh = 8.1 kWh

Total kWh per day = 15.84+1.08+2+8.1 = 27.02 kWh
Given, the month has 30 days.
Total power consumed in the month =27.02 kWh×30=810.6 kWh

Electricity bill = Total power consumed in one month× Cost of one electric unit = 810.6×3.45= Rs. 2796.57 Rs. 2797

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