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WAEC Mathematics 2023 Paper

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Question : 46

Total: 50

A notebook of length 15 cm was measured to be 16.8 cm, calculate, correct to two d.p, the percentage error in the measurement.

12.00%
11.71%
10.71%
11.21%

Solution:

Error = 16.8 - 15 = 1.8cm

% error = $\frac{error}{\text{Actual value}} \times 100\%$

= $\frac{1.8}{15} \times 100\%$

= $0.12 \times 100\%$

= 12.00%

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