Question

A garden is in the shape of a semicircle of radius 42m.A person jogs around the garden 3 times. what is the distance job by him?

Answer 1

hey.

since perimeter of a semicircle = pi*r + 2r

hence perimeter of a semi-circle of radius 42 m = 22/7 * 42 + 2*42

= 22*6 + 42*2

= 132 + 84

= 216 m.

Distance around the garden 3 times

= 3*216

= 648 m.

hope it helps you!!

Answer 2

Given that Garden is in the shape of semicircle.

Given, radius = 42m.

We know that Perimeter = πr

                                         = (22/7) * 42

                                         = 22 * 6

                                         = 132 m.

Given that person jogs around the garden 3 times.

⇒ 3 * 132

⇒ 396 m.

Therefore, the distance jogged by him = 396 m.