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Question
The area of a circle is 2464 square metres. What will be its circumference?
Options
132 metre
176 metre
231 metre
272 metre
MCQ
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Solution
176 metre
Explanation:
πr2 = 2464
⇒ `22/7 xx "r"^2` = 2464
⇒ r2 = `(2464 xx 7)/(22)` = 784
∴ r = `sqrt784` = 28 metre
∴ Circumference of circle = 2πr
= `2 xx 22/7 xx 28`
= 176 metre
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Mensuration - Area and Volume (Entrance Exam)
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