What is the cost of running seven 40 W lamps and five 80 W lamps
PHYSICS
JAMB 2017
What is the cost of running seven 40 W lamps and five 80 W lamps for 12 hours of the electrical energy cost N7.00kWh?
- A. N80.00
- B. N45.36
- C. N65.00
- D. N57.12
Correct Answer: D. N57.12
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