A bricklayer measured the length of a wall and obtained 4.10m. If the actual length of the wall is 4.25m, find his percentage error.

  • A 3 9/17%
  • B 3 27/41%
  • C 15%
  • D 35 5/17%
  • E 36 24/41%
waec 1992mathematics

The correct answer is A. 3 9/17%

Error = 4.25 - 4.10 = 0.15

% error = \(\frac{0.15}{4.25} \times 100%\)

= \(\frac{15}{\frac{17}{4}} = \frac{15 \times 4}{17}\)

= \(3\frac{9}{17} %\)

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