In a house there are ten 60 W lamps , ten 40 W fans and a heater of 1000 W . They are used on an Average for 6 hours. Find the bill in a month of 30 days , if 1 BOT = 40 paise.
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Power of the 1 lamp = 60 W.
Power of the 10 W lamps = 600 W.
= 0.6 kW.
Power of the ten fans = 10 × 40
= 400 W.
= 0.4 kW.
Power of the Heater = 1000 W.
= 0.1 kW.
Total Power = 0.6 + 0.4 + 0.1
= 1.1 kW.
Electrical Energy consumed by them Daily = 1.1 × 6
= 6.6 kWh.
Electric Energy consumed = 6.6 × 30
= 198 kWh.
∴ Cost of the Electrical Energy consumed = 198 × 30/100
= 594/10
= Rs. 59.4
Hence, the cost of the Electrical Energy is Rs. 59.4.
Hope it helps.
Power of the 10 W lamps = 600 W.
= 0.6 kW.
Power of the ten fans = 10 × 40
= 400 W.
= 0.4 kW.
Power of the Heater = 1000 W.
= 0.1 kW.
Total Power = 0.6 + 0.4 + 0.1
= 1.1 kW.
Electrical Energy consumed by them Daily = 1.1 × 6
= 6.6 kWh.
Electric Energy consumed = 6.6 × 30
= 198 kWh.
∴ Cost of the Electrical Energy consumed = 198 × 30/100
= 594/10
= Rs. 59.4
Hence, the cost of the Electrical Energy is Rs. 59.4.
Hope it helps.
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