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Question

There are 5 tube-lights each of 40 W in a house. These are used on an average for 5 hours per days In addition, there is an immersion heater of 500 W used on an average for 1 hour per day. The number of electricity are consumed in a month is.

A
25 units
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B
50 units
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C
66 units
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D
100 units
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Solution

The correct option is C 66 units
5 tube of 40w each =40×5=200w/h
=200÷1000uwh
=0.2uwh
Electric press of 500w=500×4=2000w/h
=2uw
Now,
Power consumption of 5 tuber in 30 days =(30×0.2)
=6uwh
Power consumption of 1 press in 30 days =(30×0.2)
=60uwh
Total energy consumption by tube lights and press in 30 days =(60+6)
=66uwh
Hence, the answer is 66 units.


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