Can you tell the formula of area of this circle? – InterviewSolution

1.

Can you tell the formula of area of this circle?

Answer»

For obtained rectangle

Length of rectangle = 1/2 x circumference

⇒ Area of rectangle = length x breadth

= 1/2 x circumference x breadth

If radius of circle is r, then

Area = 1/2 x 2πr x r = πr²

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