Question

an electric heater rated 800 watt operate 6h per day. find the cost of energy to operated for 30 days at rupees 3 per day

Answer 1

$\frac{800}{1000} \times 6 \times 30 \times 3$
$0.8 \times 6 \times 90$
$432units$

Answer 2

432 units is the answer.