A certain household has consumed 250 units of energy during a month. How much energy is this in joules?
1 unit of energy is equal to 1 kilowatt hour (kWh).
1 unit = 1 kWh
1 kWh = 3.6 x 106 J
Therefore, 250 units of energy = 250 x 3.6 × 106 = 9 x 108 J.
