Question

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.​

Answer 1

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