Question

A circular region has population of about 15,500 people and a population density of about 775 people per square kilometer find the radius of the region

Answer 1

Radius of the region = 2.5 km (Approx)

Explanation:

Given:

Total population = 15,500

Density = 775 people per square kilo meter

Find:

Radius of the region

Computation:

Total ares = 15,500 / 775

Total ares = 20 km

Total ares = πr²

20 = (22/7)r²

r² = 6.363636

r = 2.52

Radius of the region = 2.5 km (Approx)