In a hostel, 160bulb, of resistance 1200...

In a hostel, 160bulb, of resistance `1200Omega` eachar lighhted on a 220V supply every day from 6.P.M to 11.P.M. If the electrical energy costs 25paise per kilowatt hour, find the cost of lighting the hostel for a mont of 30days.

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The correct Answer is:

Rs242

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NN GHOSH-HEATING AND CHEMICAL EFFECT OF CURRENT-EXAMPLE B

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