Question

an electric bulb of 400 works for 8 hours a day .calculate the units
of energy consumed in 30days

Answer 1

power = 400W

Time = 8 hours

convert power W into KW

then, 400 W = 0.4 KW

energy consumed in one day = P x T

= 0.4 x 8

= 3.2 KW hr

energy consumed in 30 day =   energy consumed in one day x 30

= 3.2 x 30

= 96 KW hr

Therefore, Energy consumed in 30 day is 96 KW hr