Practice!

Sample Problem

There are 150 traffic lights on 10 streets. If each traffic light consumes 12 kwh (kilowatt hour) of electricity per month, how much electric power in kwh do traffic lights require per month on a street?

kwh

Solution

Number of lights on each street: 150 ÷ 10 = 15

Energy required for each street per month: 15 × 12 = 180