Question

The population of the town 3 years ago was 'b' and the population of the town for next 3 years fro now will be 'c'.What is the current population of the town i the growth rate is same?

Answer 1

Late the population increases at the rate of r per year and present population is x, then
b[1+(r/100)]^3 = x =>[1+(r/100)]^3 = x/b
Also x[1+(r/100)]^3=c => x*x/b= c or x^2= bc 
Hence x= Sqrt(bc)