An electrical appliance is rated 1500 W, 250 V. This appliance is connected to mains of voltage 250 V for 60 hour. Calculate :
the cost of electrical energy consumed at a rate of 4.50 per kWh.

Explanation

Given : rating of the appliance = 1500 W, 250 V i.e., P= 1500 W, V = 250 volt, time t = 60 h
Cost of electrical energy = electrical energy consumed in kWh `xx` rate per kWh
` = 90 xx Rs. 4.50 = Rs. 405.0`