Question

the annual rate of a growth of a population of a town is 12% if its present population is 156800 what it was 2 year ago​

Answer 1

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We can solve this by using Simple interest formula .

Let's population = principal

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Population = 156800

Rate of growth = 12 %

time = 2 years

By using SI formula =( p x r x t )/100

$\frac{156800 \times 12 \times 2}{100} = 37632$

Population of town two years ago =

156800 - 37632 = 119168

Answer 2

Answer:

use p×r×t/100

156800×12×2/100=37632

then

156800-37632=119168