Question

An electric oven rated at 500w is connected to a 220v line and used for 2 hours daily. Calculate the cost of electric energy per month at the rate of Rs.5 per KWh

Answer 1

Energy consumed per day =Power×time
=500 Wh=0.5kWh

Energy consumed for 30 days=$0.5\times$2 ×30=30kWh

Cost=30*5
=Rs. 150

alt solution :

$(500\times {10}^{-3})(2\times 30)\times 5=150Rs$