Q. 27 C

# The length of radius of a circular field is r meter. If the area of other circle is x times of first circle, let us see by calculating how length is of radius of other circle.

Given that the length of the circular field = r meter

The area of the circular field = πr2

Also, given that the area of the other circle = xπr2

We know that area of the circle = π(radius)2

Then, π ×(radius of other circle)2 = xπr2

(Radius of the other circle)2 = x r2

Radius of the other circle = r √x meter

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