Question

If the area of a semi circular field is 30800 sq. M . Then the perimeter of the field is

Answer 1

find this attachment

Answer 2

Given:

Semi circle,

Area = 30800 sq.m

To find:

Perimeter

Solution:

By formula,

Perimeter = π * r + 2 * r

To find r,

Area = π * r^2 / 2

Substituting,

30800 = 22 / 7 * r^2 / 2

r^2 = 30800 * 2 * 7 / 22

Solving,

r^2 = 19600

r = 140 m

Perimeter = 3.14 * 140 + 2 * 140

We get,

Perimeter = 720 m