Question

a) A household uses the following electric appliances: (i) Refrigerator of rating 400 W for ten hours each day. (ii) Two electric fans of rating 80 W each for twelve hours each day. (iii) Six electric tubes of rating 18 W each for 6 hours each day. Calculate the electricity bill of the household for the month of June if the cost per unit of electric energy is Rs. 3.00. b) An electric iron of resistance 20Ωtakes a current of 5 A. Calculate the heat developed in 30sec.

Answer 1

your answer is
a - 591120 rs
b - 15000 joule