Question

It takes about four minutes to bake a potato in a 1000 W microwave oven. How much energy is used?
Answer: .07kWh

Answer 1

1000W * 4*60 s /( 3600 s/h) / (1000 W/kW)

= 1000*4*60/(3600*1000) kW-h

= 240/3600 kW-h

=1/15 kW-h

= 0.0667 kW-h (to 4 decimal places)

Answer 2

Answer:

0.07 kWh

Explanation: