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In the diagram above, PXR and PYO are two semicircles with diameters 14cm and 7cm...

Mathematics
WAEC 1991

In the diagram above, PXR and PYO are two semicircles with diameters 14cm and 7cm respectively. Find the perimeter of the region (take \(\pi\) = \(\frac{22}{7}\) )

  • A. 22cm
  • B. 33cm
  • C. 40cm
  • D. 47cm
  • E. 66cm
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Correct Answer: Option C
Explanation

P = \(\pi\)r + \(\pi\)r + R = \(\frac{22}{7}\) x 7 + \(\frac{22}{7}\) x \(\frac{7}{2}\) + 7

P = 22 + 11 + 7 = 40cm


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