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How you can calculate charges for using 200 watt bulb for 30 hours?
Wiki User
∙ 8y ago
1 kW = 1000 W
200 / 1000 = 0.2
So the 200 W bulb is also a 0.2 kW bulb.
0.2 x 30 = 6
So a 200 W bulb uses 6 kWh in 30 hours.
Now all you have to do is find the price of a kWh, and take that times 6.
Wiki User
∙ 8y ago
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