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An open rectangular box externally measures 4m x 3m x 4m. Find the total cost...

Mathematics
JAMB 1986

An open rectangular box externally measures 4m x 3m x 4m. Find the total cost of painting the box externally if it costs N2.00 to paint one square meter
  • A. N96.00
  • B. N112.00
  • C. N136.00
  • D. N160.00
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Correct Answer: Option B
Explanation
Total surface area(s) = 2(4 x 3) + 2(4 x 4)

= 2(12) + 2(16)

= 24 + 32

= 56cm2

1m2 costs N2.00

∴ 56m∴ will cost 56 x N2.00

= N112.00

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