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

  • A 6.8%
  • B 7.3%
  • C 9.6%
  • D 14.4%
  • E 15.4%

The correct answer is B. 7.3%

% error = error/exact x 100/1

= 0.09/1.23 x 100/1 = 7.3%

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