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JAMB Mathematics 2010 Question 4

Question 4

Ratio, Percentages and Rates

A student measures a piece of rope and found that it was 1.26 m long. If the actual length of the rope was 1.25 m, what was the percentage error in the measurement?

  1. A.0.40%
  2. B.0.01%
  3. C.0.25%
  4. D.0.80%
Show the answer and explanation

Answer: D (0.80%)

Explanation

The error is 0.01 m, so the percentage error is 0.01/1.25 × 100% = 0.8%.