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Maths-

General

Easy

Question

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

5 m
6 m
7 m
8 m

hint Hint:

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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