Question

An electric heater draws a current of 10A from a 220V supply. What is the cost of using
the heater for 5 hours everyday for 30 days if the cost of 1 unit (1 kWh) is Rs 5.20?

Answer 1

Answer:

Working hrs per day =5

Total working hrs for 30 days = 30 × 5= 150 hours

power = current x voltage

=10 x 220 = 2200 W

Energy = Power × Time

= 2200 W × 150 h

=330000 Wh

=330 kWh

Cost = 330 kWh × ₹2.50 / kWh

= ₹825