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Question

A geyser has a label 2kW,240V. What is the cost of running it for 30minutes,if the cost of electricity is rupees3 per unit?


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Solution

Step 1: Given data

Power, P=2kW

Voltage, V=240V

Time for which it is running, t=30minutes

cost of electricity per unit =3

Step 2: Calculating electrical energy consumed

E=power×time=2kW×0.5hours=1kWh(or1commercialunit)

Step 3: Calculating the cost of electricity

Cost=3×1=3

Hence, the cost of running is 3.


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