Question

what will be the monthly electrical bill of a person who runs two electric bulb 100 watt each working 100 hours in a month electricity rate is 5 per unit?

Answer 1

Hey there !

Thanks for the question !

Solution:

Given information :

Power Rating = 100 W

Number of Bulbs = 2

Time = 100 Hours

Days = 30 Days

Rate per unit = Rs. 5

So, Power = Energy * Time

=> Power = 2 * 100 * 100 [ Power for 2 bulbs is calculated so 2 is multiplied ]

=> Power = 20000 Watt Hours

We know that 1 unit = 1000 Watt Hours

=> 20000 Watt Hours = 20000 / 1000 = 20 Units

Hence the number of units consumed is 20 units.

So Electricity Cost per unit = Rs. 5

So 20 units would cost : 5 * 20 = Rs. 100.

Hence the electricity bill would be Rs. 100 for two 100 W bulbs working 100 hours in a month.

Hope my answer helped !