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Find the area of the curved surface of a cone whose base radius is 6cm...

Mathematics
JAMB 1980
Find the area of the curved surface of a cone whose base radius is 6cm and whose height is 8cm. (take \(\pi\) = \(\frac{22}{7}\))
  • A. 188.57cm2
  • B. 1320cm2
  • C. 188cm2
  • D. 188.08cm2
  • E. 10cm2
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Correct Answer: Option A
Explanation
S = curved surface area = \(\pi\)rL

= \(\frac{22}{7}\) x 6 x 10

= 188.57cm2
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