Question

16 bulbs of 40 Watt are used for 6 hours a day along with one 100 watt bulb for two hours. Calculate the units of energy consumed in one day by all the bulbs.

Answer 1

16 bulbs of 40 Watt are used for 6 hours a day along with one 100 watt bulb for two hours. Calculate the units of energy consumed in one day by all the bulbs.

$$40 W = 0,04 \, kW$$ $$100 W = 0,1 \, kW$$ $$1 \, kW \cdot h = 3,6 \cdot 10^{6} \, J$$ $$16 \cdot 0,04 \, kW \cdot 6 \, h + 0,1 \, kW \cdot 2 \, h = 4,04 \, kW \cdot h = 14,544 \, MJ$$

Answer: $4,04 \, kW \cdot h$ or $14,544 \, MJ$