Calculate the cost of operating a heater of 500 W for 20 hours at the rate of ₹ 3.90 per unit.

Question

Calculate the cost of operating a heater of 500 W for 20 hours at the rate of &#x20B9; 3.90 per unit.

Philoid · Accepted Answer

Here, Power of heater (P) = 500W = 0.5kW, Time(t) = 20hr

We know that

Energy consumed = P x t = 0.5 X 20

= 10kwh

Total cost = 10xcost per unit

Cost per unit = Rs. 3.9 per unit

Therefore, total cost = 10 x 3.9 = Rs 39