Question

a fan rated at 1-00 watts is run for 5 hours daily find the cost of operating the fan at the rate of rs 3 per unit ​

Answer 1

Answer:

Rs 0.6

Explanation:

Power = 100 watts

Time = 5 hours

as we know that, power = energy by time

So, we get energy = power × time

here power = 100 watts which is equal to 0.1 KW

So, energy = 0.1 KW ×5 H = 0.2 KWH or 0.2 units

Rate of 1 unit = Rs 3

so, rate of 0.2units= 3×0.2=Rs 0.6