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Find the radius of a circle whose area is 616 sq. m.
Given:
Area of the circle$=616\ m^2$.
To do:
We have to find the radius of the circle.
Solution:
Let the radius of the given circle be $r$.
We know that,
Area of a circle of radius $r=\pi r^2$.
Therefore,
$\pi r^2=616\ m^2$
$\frac{22}{7}\times r\times r=616\ m^2$
$r^2=\frac{616\times7}{22}$
$r^2=28\times7$
$r^2=196$
$r=\sqrt{196}$
$r=16$
Radius of the circle $=16\ m$.
Radius of the circle is 16 m.
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