The cost of running five 60 W lamps and four 100 W lamps for 20
PHYSICS
JAMB 2001
The cost of running five 60 W lamps and four 100 W lamps for 20 hours if electrical energy cost ₦10.00 per kwh is
- A. ₦280.00
- B. ₦160.00
- C. ₦120.00
- D. ₦140.00
Correct Answer: D. ₦140.00
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