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The height of a pyramid on square base is 15cm. If the volume is 80cm\(^3\),...

Mathematics
WAEC 1999

The height of a pyramid on square base is 15cm. If the volume is 80cm\(^3\), find the length of the side of the base

  • A. 3.3cm
  • B. 5.3cm
  • C. 4.0cm
  • D. 8.0cm
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Correct Answer: Option C
Explanation

Volume = \(\frac{1}{3} b^2 h\)

\(\therefore b = \sqrt{\frac{3v}{h}}\)

\(b = \sqrt{\frac{3(80)}{15}} \)

\(b = \sqrt{16} = 4.0 cm\)


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post UTME Past Questions Agent
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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
Post UTME Past Questions Agent
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