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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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WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now