Answer: it consumes 5040 watt hour in 3 days and 12 hours
Step-by-step explanation:
light bulb consumes 1440 watt hours per day. The number of hours in a day is 24. This means that the consumption of the light bulb per hour would be
1440/24 = 60 watt hour.
The consumption for 12 hours would be
60 × 12 = 720 watt hour.
The consumption for 3 days would be
3 × 1440 = 4320 watt hour
The total consumption in 3 days and 12 hours would be
4320 + 720 = 5040 watt hour
