RRB ALP practice question
An electric refrigerator has a power rating of 500 W and is used for 6 hours each day. If the cost of electrical energy is ₹4.00 per kilowatt-hour, what will be the total cost of operating the refrigerator for 30 days?
From a RRB ALP Science practice set · Science
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Correct answer: (A) ₹360
The refrigerator's power is 0.5 kW, used 6 h/day for 30 days, consuming 0.5 × 6 × 30 = 90 kWh. At ₹4/kWh, the total cost = 90 × 4 = ₹360.
हिंदी में प्रश्न
एक इलेक्ट्रिक रेफ्रिजरेटर की पावर रेटिंग 500 W है और इसे प्रतिदिन 6 घंटे उपयोग किया जाता है। यदि विद्युत ऊर्जा की लागत ₹4.00 प्रति किलोवाट-घंटा है, तो 30 दिनों तक रेफ्रिजरेटर चलाने की कुल लागत क्या होगी?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) ₹360
फ्रिज की शक्ति 0.5 kW है, जो 30 दिनों तक प्रतिदिन 6 घंटे उपयोग होने पर 0.5 × 6 × 30 = 90 kWh ऊर्जा खर्च करता है। ₹4/kWh की दर से कुल लागत = 90 × 4 = ₹360 होगी।
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