Question

The population of a city is 480000. If the population increases by 5% every year, what will it be after 3 years?

Answer 1

5% of 480000 × 3yrs+480000
5/100×480000×3+480000
72000+480000
552000

Answer 2

population = 4,80,000
% increase in one year = 5 %
 ∴ % increase in 3 years = 3 × 5 = 15 %
∴ population increase in three years = 480000 ×15/100
                                                     =  4800 × 15 
                                                        = 72,000
∴ total population = actual population + population increase
                              480000 + 72000
                       = 552000 



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