WAEC Mathematics 2006 Question 25

Question 25

Commercial Arithmetic

A machine valued at ₦20,000 depreciates by 10% every year. What will be the value of the machine at the end of two years?

  1. A.₦16,200
  2. B.₦14,200
  3. C.₦12,000
  4. D.₦8,000
Show the answer and explanation

Answer: A (₦16,200)

Explanation

Each year the value is multiplied by 0.9: 20,000 × 0.9 × 0.9 = ₦16,200.