An electric lamp is marked $60\, W$, $ 230\, V$. The cost of $1\, kilowatt$ hour of power is Rs. $1.25$. The cost of using this lamp for $8$ hours is Rs. ................
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(d) Total energy consumed $ = \frac{{60 \times 8}}{{1000}} = 0.48\,\,kWH$
So cost $ = 0.48 \times 1.25 = 0.6\,\,Rs.$
So cost $ = 0.48 \times 1.25 = 0.6\,\,Rs.$
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