Question

If the perimeter of a circle is equal to 'twice' that of a square, then the ratio of their areas is (a) 13: 22 (b) 56 : 11 (c) 22:13 (d) 11:56

Answer 1

Answer:

A

Step-by-step explanation:

I hope it help you thank you

Answer 2

Given : The perimeter of a circle is equal to twice that of square,  

To Find :     ratio of their areas is: -

Solution:

Radius of circle  =  r

Side of square = a

Perimeter of circle =2πr

Perimeter of square = 4a

2πr = 2 * 4a

=> r = 4a/π

Area of circle  = πr²  = π(4a/π)²  = 16 a²/π

Area of  square = a²

Ratio  =  16 /π

16/(22/7)

= 7 * 16 /22

= 56/11

ratio of their areas is: -  56 : 11​

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