The area of a semicircle is 77 cm². What is its perimeter? (Take π = 22/7)
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Worked Solution
Step 1: Area of semicircle = πr²/2 = 77. So πr² = 154, r² = 154 × 7/22 = 49, r = 7 cm.
Step 2: Perimeter of semicircle = πr + 2r = 22/7 × 7 + 2 × 7 = 22 + 14 = 36 cm.
Answer: 36 cm
Correct answer: 36 cm
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