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

R s 6

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R s 3

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R s 9

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R s 1

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Solution

The correct option is B $R s 3$
$R a t e = 0.60 R s / k W h$
$E n e r g y = P o w e r \times t i m e$
Energy consumed, $E = 2.5 \times 2 = 5 k W h$
Cost, $C = 5 \times 0.60 = R s 3$

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