A certain household has consumed 250 units of energy during a month. How much energy is this in joules ?

Explanation

Energy consumed = 250 units
`= 250 kWh" "` (or 250 kilowatt - hours)
Now, 1 kilowatt-hour `= 3.6 xx 10^(6)` joules
So, 250 kilowatt-hours `= 3.6 xx 10^(6) xx 250` joules
`= 9 xx 10^(8)` joules