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GCE Mathematics 1989 Question 13

Question 13

Ratio, Percentages and Rates

Instead of recording the number 1.23cm of the radius of a tube, a student recorded 1.32cm. Find the percentage error, correct to one decimal place.

  1. A.6.8%
  2. B.7.3%
  3. C.9.6%
  4. D.14.4%
  5. E.15.4%
Show the answer and explanation

Answer: B (7.3%)

Explanation

Error = 1.32 − 1.23 = 0.09. Percentage error = 0.09/1.23 × 100 = 7.3%.