A 100 W electric bulb is used for 10 hours a day. How many units of electrical energy are consumed by the bulb in 3 days? (1 unit = 1 kWh)

Explanation

Total energy consumed = Power \times Time. Power = 100 W = 0.1 kW. Total time = 10 hours/day \times 3 days = 30 hours. Energy = 0.1 \times 30 = 3.00 kWh (units).

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