Physics

An electric iron is rated 220 V, 2 kW. If the iron is used for 3h daily, find the cost of running it for 1 week if it costs ₹ 4.25 per kWh.

Current Electricity

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Answer

Given,

Power (P) = 2 kW

Voltage (V) = 220 V

Time (t) = 7 x 3 = 21 h

From relation,

E = P × t

Substituting the values in the formula above, we get,

E = 2 x 21 = 42 kWh

cost for 1 kWh of energy = ₹ 4.25

∴ Cost for 42 kWh of energy = 4.25 x 42
    = ₹178.50

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