Question

Calculate the electricity bill amount for a month of 30 days, if the following devices are used as specified: (a) 4 bulbs of 60 W for 6 hours (b) 3 tube lights of 40 W for 8 hours (c) A refrigerator of 300 W for 24 hours (d) An electric mixer of 750 W for 1 hour (e) A TV of 100 W for 6 hours The cost per unit of electricity consumed is Rs. 2.50 for first 50 units and Rs. 3.00 for every unit consumed in excess of 50

Answer 1

Answer:

As we know Power = Energy consumed/time

Energy consumed = Power×time

Energy consumed by bulbs = 60×6 = 360W/hr

Similarly, energy by Tube lights = 40×8 320W/hr

Energy consumed by refrigerator = 300×24 = 7200 W/hr

Energy consumed by electric mixer = 750×1 = 750W/hr

Energy consumed by TV = 100×6 = 600 W/hr

Energy consumed per day = 9230 W/hr

= 9.23 KW/hr

Energy consumed per month = 9.23×30 = 276.9KW/hr

Hence cost = 3×276.9 = 8307rupees.

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