Question

34. Calculate the electricity bill amount for a month of October, if the forlowing devices are used as
specified:
(a) 2 bulbs of 40W for 3 hours.
(b) 2 LED of 20 W for 6 hours.
(c) 4 tube lights of 50 W for 2 hours.

(d) A refrigerator of 410W for 24 hours

Given the rate of electricity is 3.50 per unit.​

Answer 1

Answer:

Bulb = (40/1000)×2×3 = 0.24 units

LED. = (20/1000)×2×6 = 0.24 units

Tube Lights. = (50/1000)×4×2 = 0.40 units

Refrigerator. = (410/1000)×24 = 9.84 units

Total units consumed= 10.72 units

Rate of electricity for the month of October= 10.72units × 30 days × Rs. 3.50= Rs. 1,125.60

Explanation:

Find out the watts of each electronic devices and then convert watt to kilowatts ie, 1 watt= 1000 kilowatts