The area of a circle is 38.5 cm^2 . Find its circumference (in cm ). (Use π = 22/7 ) - Quantitative Aptitude MCQ SSC Selection Post 2021 Matriculation Level 2026 | ExamTest.live

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The area of a circle is 38.5 cm^{2} . Find its circumference (in cm). (Use π = \frac{22}{7})

Solution & Step-by-step Explanation

The area of a circle is calculated using the formula: Area = π r^{2} 38.5 = \frac{22}{7} \times r^{2} r^{2} = \frac{38.5 \times 7}{22} = \frac{269.5}{22} = 12.25 r = 12.25 = 3.5 cm Now, calculate its circumference: Circumference = 2 π r = 2 \times \frac{22}{7} \times 3.5 = 2 \times 22 \times 0.5 = 22 cm

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The area of a circle is 38.5 cm^{2} . Find its circumference (in cm). (Use π = \frac{22}{7})

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