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A chord of length 30cm is 8cm away from the center of the circle. What...

Mathematics
WAEC 2001

A chord of length 30cm is 8cm away from the center of the circle. What is the radius of the circle? Take \(\pi =\frac{22}{7}\)

  • A. 16cm
  • B. 17cm
  • C. 18cm
  • D. 20cm
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Correct Answer: Option B
Explanation

From the diagram
r\(^2\) = B\(^2\) + 15\(^2\)
= 64 + 225
r = \(\sqrt{289}\) = 17cm


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