Question

A house is fitted with 4 lamps of 100 W each and two fans consuming 0.25 A each. If energy is supplied at 200 V and costs Rs 3 only per KWh, find the monthly bill if all appliances run for 5 hour a day.

Answer 1

Answer:₹225

Explanation

Power consumed by each lamp = 100 W

Power consumed by each fan = Ivt

Here I stands for electric current = 0.25 A

Here v stands for voltage = 200 V

Here t stand for time = 1 hr

Power consumption by fan = 0.25 × 200× 1 = 50 W

Time = 5hr a day

For 1 month = 5×30= 150 hr

Total energy consumed in 1 second = 100×4+50×2 = 500 W

Total energy consumed in month 500×150= 75,000 W

Consumption in KW = 75 kWh

Bill = 75×3 = ₹225