Question

an electric heater is rated at 2KW .Calculate the cost of using it for 2H daily for the month of september if each unit cost is RS4

Answer 1

Energy consumed = power × time
= 2 × 2 = 4KWH
Energy consumed for the month of september = 4×30= 120 kwh =120 unit

Cost = 120×4=Rs 480

Answer 2

Explanation:

the total energy consumed will be

E = 2kW x 2hrs x 30days = 120 kWh

and

the total cost will be

= Rs 2.50 x 120 kWh

or

= Rs. 300