Mensuration Practice Test 4

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Question : 4 of 40

Marks: +1, -0

The side of a square measuring 20 cm. Find the radius of the circle whose perimeter is equal to the perimeter of the square.

11.27 cm
12.72 cm
12.52 cm
14.54 cm

Solution:

Radius of the circle =

{2x}

x = 20
=

{2×20}/{{22}/7}/π

=

{40}/{{22}/7}

=

40 × 7/{22}

=

{280}/{22}

= 12.72 cm

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