Question

In a house, 5 bulbs of 40W, 4 bulbs of 1000 W and 750W refrigerator are used for 5 hours daily. Thn how much energy is consumed per day?

Answer 1

The energy consumed daily is`=24.75kWh`

Explanation:

The power installed is

`P=(5*40)+(4*1000)+(750)=4950W`

The time is

`t=5h`

The energy consumed daily is

`E=Pt=4950*5=24750Wh=24.75kWh`

Answer 2

The energy consumed per day is `24.75 "kiloWatt" * "hours"`.

Explanation:

Adding those power ratings together:

`5*40 W + 4*1000 W + 1*750 W = 4950 W`

The power company measures energy in `"kiloWatt" * "hours"`.

Multiplying the power total by the 5 hours gives us the energy consumed per day:

`4.95 "kiloWatt" * 5 "hours" = 24.75 "kiloWatt" * "hours"`

I hope this helps,
Steve