Question

In an electrical heater of 1000W is used for 30 minutes every day. What is the cost of using it for a month of April ,if 1unit costs ₹3.50​

Answer 1

30 minutes = 1/2 half hour

1000 W = 1000/1000 KW

             = 1 KW

So, the unit of electricity has used ={ (1*1/2)*30} KWh

                                                         = (0.5*30) KWh

                                                         = 15 KWh

The cost of the unit = (15*3.50)

                                 = rs. 52.50

(Ans): rs. 52.50

[The unit of electricity is measured in kwh.]