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.

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%

waec 1989 mathematics

The correct answer is B. 7.3%

% error = error/exact x 100/1

= 0.09/1.23 x 100/1 = 7.3%

Previous question Next question