WAEC Mathematics 2023 Objective — Question 20
Question 20 of 50 from the West African Examinations Council (WAEC) Mathematics 2023 Objective paper, with the correct answer and a full explanation.
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A notebook of length 15 cm was measured by a student as 16.8 cm. Calculate, correct to two decimal places, the percentage error in the measurement.
- A. 12.00%Correct
- B. 11.71%
- C. 11.0%
- D. 10.71%
Explanation
% error=|measured-original|/original×100 = (16.8-15)/15×100 = 1.8/15×100 = 12.00% (2 d.p.).
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