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Question
A geyser is rated 2000 W and operates 2 hours a day on 200 V mains. Calculate the monthly bill for running the geyser when energy costs ₹ 1.90 per kWh.
Numerical
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Solution
Power of geyser P = 2000 W
Energy consumed by geyser in a day = 2000 W × 2 h
= 4000 Wh
= 4 kWh
Energy consumed by geyser in 30 days (month) = 4 kWh × 30
= 120 kWh
Monthly bill \[= 120 \text{ kWh} \times \frac{₹ 1.90}{\text{ kWh}}\] \[= \text{₹228}\]
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