If a rod of length 250cm is measured as 255cm long in error, what is the percentage error in the measurement?
A
55
B
10
C
5
D
4
E
2
Verified Correct Answer: E.
Step-by-Step Mathematical Solution
% error = \(\frac{\text{Actual error}}{\text{real value}}\) x 100
= \(\frac{5}{250}\) x 100
= 2%
Source: Myschool Past Questions Archive (Record #32468)