Instead of recording the number 1.23cm of the radius of a tube, a student recorded...

WAEC 1989

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%

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Correct Answer: Option B

Explanation

% error =

error/exact

100/1

0.09/1.23

100/1

= 7.3%

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Instead of recording the number 1.23cm of the radius of a tube, a student recorded...

Correct Answer: Option B

Explanation

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