Question

A 100 watt electric bulb is lighted for 5 hours daily and four 6 watt bulbs are lighted for 3hours daily. Calculate the energy consumed (in kWh) in a month of 30 days

Answer 1

Answer:

$\huge\mathcal{Answer}$

Answer 2

Answer:

Energy = Power*time

Energy consumed by 100 W bulb per day = 2∗100 Wh

= 0.2 kWh

Energy consumed by 40 W bulbs per day = 4∗40∗4 Wh

= 0.64 kWh

Total energy consumed per day = 0.2 + 0.64 kWh

= 0.84 kWh

Therefore, the energy consumed in 30 days = 30∗0.84 kWh

= 25.2 kWh