PhysicsElectrical energy and powerWAEC
A 60 W bulb is used for 5 hours a day for 30 days. At ₦50 per kWh, what is the cost?
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Answer: D. ₦450
Energy = 0.06 kW × 150 h = 9 kWh; cost = 9 × ₦50 = ₦450.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.