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      Question

      The circumference of a semi-circle is 108 cm. What is

      the area of the circle with the same radius as the semi-circle? (Take ╧А = 22/7)
      A 1056 sq cm Correct Answer Incorrect Answer
      B 1320 sq cm Correct Answer Incorrect Answer
      C 1386 sq cm Correct Answer Incorrect Answer
      D 1144 sq cm Correct Answer Incorrect Answer

      Solution

      Circumference of a semi-circle = (╧А ├Ч radius) + (2 ├Ч radius) = {(22/7) + 2} ├Ч radius Or, (36/7)├Ч radius = 108 Or, radius = 108 ├Ч (7/36) So, radius = 21 cm So, area of the circle with same radius = ╧А ├Ч radius2 = (22/7) ├Ч 21 ├Ч 21 = 1386 cm2

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