Question

if the perimetre of a semicircular park is 72 m find its area and radius

Answer 1

Since Perimeter of semicircle = pi*r + 2r

=) pi*r + 2r = 72

=) 22/7 * r + 2r = 72

=) 36r/7 = 72

=) r = 72*7/36

=) r = 14m.

Since Area of semicircle = pi*r^2 /2

= 22/7 * 14*14 /2

= 22*14 m^2

= 308 m^2.

Hope it's helpful to u.

Answer 2

See the attached file