Here, Voltage (V) = 220 V
Current (I) = 10 A
Total time of consumption = 5 * 30 = 150 hours
Number of heater (N) = 1
Rate of electricity (R) = Rs. 9 per unit.
We have P = I *V = 10 * 220 = 2200 watt.
Total energy consumption = P *N * t
= 220 * 1 * 150
= 330000
= 330 kwh
Now, cost of electricity = 9 * 330 = Rs 2970
The cost of electricity is Rs 2970.