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What is the ratio of the perimeter of a circle of radius 4 units to that of a square having the circle's diameter as its side?


π : 4.


π : 2.


4 : 3.


4 : π.

Ans: a

Let X be the radius of the circle, so the side of the square is 2X. The ratio of the perimeters = ${2 × π × X}/{4 × (2X)}$ = π/4.

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