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WAEC Mathematics 2025 Question 19

Question 19

Ratio, Percentages and Rates

The population of a town increases by 2% every year. After 2 years, the population is 83,232. Calculate, correct to the nearest thousand, the original population.

  1. A.80,000
  2. B.81,000
  3. C.82,000
  4. D.83,000
Show the answer and explanation

Answer: A (80,000)

Explanation

Two years of 2% growth multiply the population by 1.02² = 1.0404, so the original population is 83 232 ÷ 1.0404 = 80 000.