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The population of a town increases by `25%` annually. If the present population is one crore, then what was the difference between the population 3 years ago and 2 years ago ?A. 2500000B. 1280000C. 1560000D. 2000000 |
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Answer» Correct Answer - B (i) `25%` increase from 1st year to 2nd year is equal to `20%` decrease from second year to the first year. (ii) Let `P(1+(r)/(100))^(n)=1` crore, where `r=25%.` (iii) Find P, when r = 3 and r=2. (iv) Find the difference in the value of P in both the cases. |
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