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If the population of a town increases by 25% in the first year and increases by 36% in the second year, then what is the average rate (in percentage)of increase in the population?1). 262). 30.53). 31.664). 35 |
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Answer» Let the initial population of town be 100. Population after first YEAR = 100 + 25% of 100 = 100 + 25 = 125 Population after second year = 125 + 36% of 125 = 125 + 45 = 170 Total increment = (170 – 100)/100 = 7/10 ∴ AVERAGE rate of INCREASE (in %) = (1/2) × (7/10) × 100 = 35% |
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