Physics Mains Electricity

A consumer has the following appliances operating in his house for the times indicated in one day:

Appliance Time

Two 40 W bulbs 30 min

One 500 W fridge 10 hrs

Four 57 W bulbs 3 hrs

One 3kW electrical heater 45 min

One 100 W television 5 hrs

Calculate:

(a) the total power of the appliances used

(b) the total electrical power consumed in kWh in 30 days, assuming that the power consumption per day is the same.

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