An electric iron is rated $220$ V, $2$ kW. If the iron is used for $2$ h daily find the cost of running it for one week if it costs Rs. $4.25$ per kWh.

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Solution

Power of the electric iron $P = 2 k W$
Time for which the iron is operated daily $t = 2 h$
Daily energy consumption $E_{d a i l y} = P t = 2 k W \times 2 h = 4 k W h$
Total energy consumed in one week $E_{w e e k} = 7 \times E_{d a i l y} = 7 \times 4 = 28 k W h$
Total cost $= R s . 4.25 \times E_{w e e k} = R s . 4.25 \times 28 = R s . 119$

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An electric iron is rated 220V, 2kW. If the iron is used for 2h daily find the cost of running it for one week if it costs Rs. 4.25 per kWh.

Power of the electric iron P=2 kWTime for which the iron is operated daily t=2 hDaily energy consumption Edaily=Pt=2 kW×2 h=4 kWhTotal energy consumed in one week Eweek=7×Edaily=7×4=28 kWhTotal cost =Rs.4.25×Eweek=Rs.4.25×28=Rs.119

An electric iron is rated $220$ V, $2$ kW. If the iron is used for $2$ h daily find the cost of running it for one week if it costs Rs. $4.25$ per kWh.