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

Explanation

Given power P= 2 kW, time t = 2h, number of days = 7 and costs = Rs. 4.25 per kWh
Electrical energy consumed = Power `xx` total time
`= 2 kW xx (2 xx 7) h`
`= 28 kWh`
Cost `= 28 xx 4.25 = Rs. 119 `