Maths-
General
Easy

Question

The boundary of a circle is 56.52 metres long. Find its radius.

  1. 8 m
  2. 9 m
  3. 10 m
  4. 11 m

hintHint:

Given the circumference of  the circle .Find the radius of the circle by using the formula circumference of circle

The correct answer is: 9 m


    ANS :- Option B
    Explanation :-
    Given, circumference of circle  = 56.52 m
    let the radius of circle r
    Then we get circumference of circle 2 pi r
    56.52 equals 2 pi r
    not stretchy rightwards double arrow r equals fraction numerator 56.52 over denominator 2 pi end fraction not stretchy rightwards double arrow r equals fraction numerator 56.52 over denominator 2 cross times 3.14 end fraction
    not stretchy rightwards double arrow r equals 18 over 2
    not stretchy rightwards double arrow r equals 9 straight m
    The radius of the circle is 9 m.
    ∴ Option B is correct

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