Question
An electric lamp is marked $60 \mathrm{~W}, 230 \mathrm{~V}$. The cost of kilowatt hour of power is $1.25 .$ The cost of using this lamp 8 hour a day for 30 days is(a) $¥ 10$(b) ? 16(c) ? 18(d) ? 20
Step 1
The power of the lamp is given as 60W and it is used for 8 hours a day for 30 days. The formula to calculate the number of units is: \[ \text{Number of units} = \frac{\text{Power (in watts)} \times \text{Time (in hours)}}{1000} \] Show more…
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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
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
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 (a) Rs. 1.20 (b) Rs. 4.00 (c) Rs. 0.25 (d) Rs. 0.60
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