A householsd uses the following electric appliances. i. Refrigerator of rating 400 W each for ten hours each day. ii. Two electric fans of rating 80 W each for 12 hours each day. iii. Six electric tubes of rating 18 W each for 6 hours each day. Calculate the electric bill of the of houselod in a month if the cost per unit electric energy is Rs 3.00.

A householsd uses the following electric appliances. i. Refrigerator

1.	A householsd uses the following electric appliances. i. Refrigerator of rating 400 W each for ten hours each day. ii. Two electric fans of rating 80 W each for 12 hours each day. iii. Six electric tubes of rating 18 W each for 6 hours each day. Calculate the electric bill of the of houselod in a month if the cost per unit electric energy is Rs 3.00.
Answer» SOLUTION :Electrical energy consumed by Refrgerator in month (in KWH) `=(1xx400xx10xx30)/(1000)=120KWH` Electrical energy consumed by two electrical fans in a month (in KWH) `=(2xx80xx12xx30)/(1000)=57.6KWH` Electrical energy consumed by electric by electric tubes in a month (in KWH) `=(6xx18xx6xx30)/(1000)=(1944)/(100)=19.44KWH` Total electrical energy consumed by all the electrical appliances = 120 + 57.6 + 19.44 = 197.04 units COST of 1 unit = Rs 3 cost of 197.04 units `= 197.04xx3=Rs591.12