Question

A room has a 60watt , a 100watt, and a 150 watt light bulb. How much does it cost to use all of the lamps for 2.5 hr @ 8 cents/ kwhr?

Answer 1

Explanation:

Here power is 60 watts. voltage is 120 so voltage x 0.5 amperes will make the power 60 watts. current= 0.5 amperes.