Question

The area of a circle is 100 square miles. What is the diameter?

Answer 1

The diameter of a circle with an area of 100 square miles is 20/√π miles.

Explanation:

Area =100 = πr^2.

diameter = d = 2r.

100 = πr^2.

100/π = r^2.

√(100/π) = r.

10/√π = r.

d = 2r.

d = 2 * 10/√π.

d = 20/√π