Question

If electrical energy cost Rs 3 per unit, what is total cost of leaving 4 bulbs rated at 100w each, switched on for 8 hours?

Answer 1

Explanation:

hi my friend the answer is 3× 36

= 108

Answer 2

Answer:

So to make this sort.

total p = p*no*hr

           = 100 * 4 * 8

            = 3200 w

             = 3.2 kWh

cost = 3 * 3.2

         = Rs 9.6

hope it  helps