An electric bulb of 40w is used for 25days at 10 hours per day. find the unit energy consumed by the bulb and the cost of using the electricity at the rate of Rs 2 per unit.
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Consumer pays Rs.
So electricity consumption per day = 40 * 10 = 400 watts. Electricity consumption for 30 days = 400 * 30 = 12000 watts. Number of units consumed = 12000 / 1000 = 12 Kw or 12 units.Nov 14, 2017
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