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Calculate the total surface area of a solid cone of slant height 15cm and base...

Mathematics
WAEC 1997

Calculate the total surface area of a solid cone of slant height 15cm and base radius 8cm in terms of π
  • A. 64πcm2
  • B. 12Oπcm2
  • C. 184πcm2
  • D. 200πcm2
  • E. 32Oπcm2
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Correct Answer: Option C
Explanation
Total surface are of a cone
= πr(r + l)
= π x 8 (8 + 150)
= 184πcm2

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