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SSC Selection Post 2022 PYQ — Question 60

SSC Selection Post - Higher Secondary Level - 08 Feb 2022 - Shift 2 • Quantitative Aptitude • Q60

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The area of a circle is 38.5 cm2. Find its circumference (in cm). (Use π=227) (Use\, \pi ={22{} \over 7})

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Correct answer: B

Explanation

The correct answer is option 2 i.e. 22.

Area = πr2 = 38.5

⇒ (22/7) × r2 = 38.5

⇒ r2 = (38.5 × 7)/22 = 12.25

⇒ r = √12.25 = 3.5 cm

Circumference = 2πr = 2 × (22/7) × 3.5 = 22 cm