An electric kettle is rated $2.5 K W, 250 V$ . Find the cost of running the kettle for two hours at $60$ paisa per unit.

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Solution

Step 1 Given data:
Power consumed $= 2.5 K W$
Voltage $= 250 V$
Rate $= 60 p a i s e p e r u n i t .$
Step 2 Calculating cost of energy consumed:
As the power/unit consumed in one hour is $= 2.5 K W$
So, the unit/power consumed in two hours will be $= 2.5 \times 2 = 5 K W$
Hence, cost of running the kettle will be $5 \times 60 = 300 p a i s e = R s . 3$
Hence, the cost of running the kettle for two hours at $60 p a i s e p e r u n i t .$ will be $R s . 3$

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