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GCE Mathematics 1990 Question 8

Question 8

Ratio, Percentages and Rates

While doing his Physics practicals, Idowu recorded a reading as 1.12cm instead of 1.21cm. Calculate his percentage error.

  1. A.1.17%
  2. B.6.38%
  3. C.7.44%
  4. D.8.05%
  5. E.9.00%
Show the answer and explanation

Answer: C (7.44%)

Explanation

Error = 1.21 − 1.12 = 0.09. Percentage error = 0.09/1.21 × 100 ≈ 7.44%.