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Question

Calculate the electricity bill for 30 days if an air conditioner of rating 2 kW is operated for 4 hours per day. The cost of electricity per unit is Rs.5.


A
Rs.120 
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B
Rs.1200 
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C
Rs.2000 
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D
Rs.200 
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Solution

The correct option is D Rs.1200 
Given:
Power rating of the air conditioner = 2 kW
Cost of electricity per unit = Rs.5 
Time for which the device is operated in a day = 4 hours
Units consumed per day = 2kW×4hours = 8 kWh = 8 units
Units consumed in 30 days = 8×30 = 240 units
Electricity bill for 30 days = 240 units×Rs.5 1unit=Rs.1200

Physics

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