Question

Radius of a circle= 100 dam. Area=49 sq.m. Its perimeter in kilometres is....​

Answer 1

Area of a circle = $\pi$$r^{2}$

Area of the given circle = 49 units

Radius of the circle = 100 x

49 = 3.14 * (100x )^ 2

49 = 3.14 * 10,000 x^2

15.6050 = 10,000 x^2

0.0015605 = x^2

x = $\sqrt{0.0015605}$

x = 0.0395031

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