Question

The perimeter of a semicircle is 108 cm . What is the perimeter of the square drawn on the diameter of the semicircle

Answer 1

Circumference of a circle is 2πr.
Perimeter of a semicirle is πr+2r
22/7*r + 2r = 108.
(22r + 14r)/7 = 108
36r = 108*7
r = (108*7)/36
r = 3*7
r = 21cm. 
Therefore, diameter = 42cm

Perimeter of a square is 4 times diameter, 4*42 = 168cm

Answer 2

find the answer in the attachment.therefore perimeter will 4*l=4*42=168cm