In a house two 60 W electric bulbs are lighted for 4 hours, and three 100 W bulbs for 5 hours every day. Calculate the electric energy consumed in 30 days.
When two electric bulb of 60W are lighted for 4 hours then
Here, P1 = 60w
Number, N1 = 2
Time for daily use, t1 = 4h
Total electrical consumed everyday, E1 = n1×p1×t1
= 2×60×4 = 480
Energy consumed in 30 days = 30×0.48 = 14.4Kwh
When three electric bulb of 100W are lighted for 5 hours then
Here, P2 = 100w
Number, N2 = 2
Time for daily use, t2 = 4h
Total electrical consumed every day, E1 = n2×p2×t2
= 3×100×5 = 1500
Energy consumed in 30 days = 30× 1.5 = 45Kwh
Total electrical consumed in 30 days = 14.4Kwh + 45Kwh = 59.4 Kwh