If the area of a circle is 154 , cm^2,then it | vedclass

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(A) Given,the area of the circle $A = 154 \, cm^2$.The formula for the area of a circle is $A = \pi r^2$,where $r$ is the radius.Substituting the valu

Vedclass · Accepted Answer

$44$

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(A) Given,the area of the circle $A = 154 \, cm^2$.The formula for the area of a circle is $A = \pi r^2$,where $r$ is the radius.Substituting the value: $154 = \frac{22}{7} 	imes r^2$.$r^2 = 154 	imes \frac{7}{22}$.$r^2 = 7 	imes 7 = 49$.$r = \sqrt{49} = 7 \, cm$.The perimeter (circumference) of the circle is given by $C = 2 \pi r$.$C = 2 	imes \frac{22}{7} 	imes 7$.$C = 2 	imes 22 = 44 \, cm$.

If the area of a circle is $154 \, cm^2$,then its perimeter (circumference) is (in $cm$):

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