An Electric Lamp is Marked 60W 230V. The Cost of a 1kwh of Energy is Rs. 1.25. The Cost of using this lamp 8 hrs a day for 30 days is:-
A) RS 10
B) RS 16
C) RS 18
D) RS 20
A) RS 10
B) RS 16
C) RS 18
D) RS 20
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The answer is ;
The Cost of using this lamp 8 hrs a day for 30 days is. ₹18
According to question, P =60w which is 60/1000= 0.06kw.
Time consumed - 8hrs x 30 days=240hrs
Total Power consumed= 240hrs x 0.06kw
= 14.4 kwh
Cost of 1 kwh = ₹1.25
Cost of 14.4 kwh = ₹1.25 x 14.4 = ₹18
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