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%
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
% error = error/exact x 100/1
= 0.09/1.23 x 100/1 = 7.3%
Source: Myschool Past Questions Archive (Record #22351)