Maths-
General
Easy

Question

The area of a circle is 153.86 m2. Find its radius. Use π = 3.14.

  1. 5 m
  2. 6 m
  3. 7 m
  4. 8 m

hintHint:

Given the area of  the circle .Find the radius of the circle by using the formula area of circle = pi r squared.

The correct answer is: 7 m


    153.86 equals pi left parenthesis r right parenthesis squared

    r squared equals fraction numerator 153.86 over denominator pi end fraction not stretchy rightwards double arrow r squared equals fraction numerator 153.86 over denominator 3.14 end fraction

    not stretchy rightwards double arrow r squared equals 49 not stretchy rightwards double arrow r equals square root of 49
    not stretchy rightwards double arrow r equals 7 m
    ANS :- Option C
    Explanation :-
    Given, area of circle  = 153 .86 sq. m
    let the radius of circle r
    Then we get area of circle = pi r squared
    The radius of the circle is 7 m.
    ∴ Option C is correct

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