1.

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

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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