An electric bulb of 40 watt is used for 25 days at 10 hours per day find the units of energy consumed by the bulb and cost of using electricity at the rate Rupees 2 per unit
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Answer: Energy consumed by the bulb = 10 units
Cost = 20 Rupees
Explanation:
Power of bulb = 40 watt
Total usage = 25 × 10 = 250 hours
total energy consumed = power × time = 40 × 250 = 10,000 (watt.hour)
= 10 kilo watt.hour = 10 units
(One unit = 1 kilo watt hour)
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