Question

9. Number of residents in a particular colony rose to
4200 from 3500 in 5 years. If the trend continues in
the same way, what will be the number of residents of
the colony after 10 years?​

Answer 1

Answer:

Residents increased last year's = 4200-3500=700

Let assume, annual simple interest rate is = r%

\begin{gathered} \frac{3500 \times r \times 5}{100} = 700 \\ = > r = 4\% \\ \end{gathered}

100

3500×r×5

=700

=>r=4%

Now,

In 10 years there will be an interest actual population is

\begin{gathered} \frac{3500 \times 10 \times 4}{100} + 3500 \\ = 4900\end{gathered}

100

3500×10×4

+3500

=4900