Question

If a 10w lightbulb is left on for 168 hours , how many kilowatt - hours does it consume?

A: 1.68 kwh

B: 168 wh

C: 16.8 wh

D: 16.8 kwh​

Answer 1

Answer: Choice A

Work Shown:

10 watts = 10/1000 = 0.01 kilowatts

Multiply that kilowatt value by the number of hours the item is in use

0.01 kw * 168 hr = (0.01*168) kwh = 1.68 kwh