2. Questions Bank
  3. 8th Class
  4. Mathematics
  5. Comparing Quantities

8th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer
    The present population of a town is 25000. It grows at 4%, 5% and 8% during first year, second year and third year respectively. Find the population after 3 years.

    A)  29484                                  

    B)                         28696                  

    C)                         24576                                  

    D)                         30184

    Correct Answer: A

    Solution :

    Population after 3 years \[=P\left( 1+\frac{p}{100} \right)\,\left( 1+\frac{q}{100} \right)\,\left( 1+\frac{r}{100} \right)\] \[=25000\times \left( 1+\frac{4}{100} \right)\times \left( 1+\frac{5}{100} \right)\times \left( 1+\frac{8}{100} \right)\] \[=25000\times \frac{26}{25}\times \frac{21}{20}\times \frac{27}{25}=29484\]


You need to login to perform this action.
You will be redirected in 3 sec spinner