There are 6 tube lights of 15watt each, 4 fans of 60watt each, a computer of 100watt and air conditioner of 2kilowatt in a office. Calculate the electricity bill of the office for the month of March if these appliances are used for 10 hours daily. Take the cost of 1 unit of energy as Rs. 2.50.
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Explanation:
Energy consumed by 4 tubelights per day, E
tubelight
=(4)(40)(5)=800 WH
Energy consumed by 3 fans per day, E
fan
=(3)(80)(12)=2880 WH
Energy consumed by television per day, E
TV
=(100)(6)=600 WH
Total energy consumed per day, E=E
tubelight
+E
fan
+E
TV
∴ E=800+2880+600=4280 WH =4.280 KWH per day
Total energy consumed in 30 days, E
T
=30×4.280=128.4 KWH
Cost of electric energy =Rs. 3.00×128.4=Rs. 385.20
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