In a house there are 3 fans 60W at 220V running for 8hrs ,4 tube lights 40W at 220V running for 7hrs daily.Calculate the amount of electrical energy consumed for the month of september .Also find how much bill will be there if cost of one unit is Rs 5.and choose correct answer.
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Answer:
Rs. 339 per month
Explanation:
Fans = 3, V= 220V, P = 60W, Time = 8hours
Tubelight = 4, V = 220V, P = 40W, Time = 7hours
No. of days = 30 days
Price of 1 unit = Rs. 5
Therefore, amount of electricity consumed = E = P x T
= Fans = 3 x 60 = 180Wh/1000 = 0.18 KWh = Energy = 0.18 x 8 = 1.44 J
= Lights = 4 x 40 = 160Wh/1000 = 0.16 KWh = Energy = 0.16 x 7 = 1.12 J
Total = 1.12 + 1.14 = 2.26 J
Total cost = Energy x price x days
= 2.26 x 5 x 30 = Rs. 339 per month
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