calculate the electricity bill amount for a month 31 days if if the following devices are used as a) 3 bulb of 40 w for 6hours. b) 4 tubelight of 50w for 8 hours. c) A TV of 120w for 6 hours (Give the rate of electricity is Rs2.50per unit)
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Answer:
bulbs × 30 watts × 5 hours × 31 days = 13950 watt/hour
4 tubes × 50 watts × 8 hours × 31 days = 49600 watt/hour
1 fridge × 300 watts × 24 hours × 31 days = 223200 watt/hour
Therefore, the total energy consumption is given by,
13950+49600+223200 = 286750 watt/hour = 286.75 KWh
We need to convert it into units, where 1 unit = 1 kWh
So, electricity bill = 288.75 units × 2 rs = Rs. 573.5.
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Hi
Plz refer the pic ..