If the present population of a city is P and it increases at the rate of r % p.a, then the population n years ago would be P (1 + r/100)^n.

Question

Say True or False:

If the present population of a city is P and it increases at the rate of r % p.a, then the population n years ago would be P (1 + r/100)ⁿ.

Answer 1

False

Let the population ‘n’ yrs ago be ‘x’

Present population (P) = x × (1 + r/100)ⁿ

x = P/(1+r/100)ⁿ