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If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours...

Physics
JAMB 1978
If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours a lamp required 1A on a 200v line?
  • A. 24k
  • B. 55k
  • C. 40k
  • D. 26k
  • E. 32k
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Correct Answer: Option A
Explanation
Energy (kWhr) = 1 x 200 x 24 x 10-3

= 4.8kWhr

1 kWhr. cost 5k

4.8kwhr. will cost (5 x 4.8)k

= 24 kobo
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