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Question

The population of a town increases at 5% per annum. Its present population is 16000. What will be its population after 2 years?


Solution

The present population of the town = 16000
Increase in population after 1 year = 5% of 16000
                                                          = 5100×16000 = 800
Thus, population after one year = 16000 + 800 = 16800
Increase in population after 2 years = 5% of 16800
                                                           = 5100×16800 = 840
Increased population after two years = 16800 + 840 = 17640

Hence, the population of the town after two years will be 17,640.

Mathematics
RS Aggarwal (2017)
Standard VII

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