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An electric lamp is marked 60 W , 230 V . The cost of a 1 kWh of energy is Rs . 1.25. The cost of using this lamp 8 hrs a day for 30 day is

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An electric lamp is marked 60 W , 230 V . The cost of a 1 kWh of energy is Rs . 1.25. The cost of using this lamp 8 hrs a day for 30 day is
A. Rs. 10
B. Rs. 16
C. Rs. 18
D. Rs. 20
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Correct Answer - C
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