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If a rod of length 250cm is measured as 255cm long in error, what is the percentage ...

If a rod of length 250cm is measured as 255cm long in error, what is the percentage error in the measurement?
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  • A 55
  • B 10
  • C 5
  • D 4
  • E 2
Correct Answer: Option E
Explanation:
% error = \(\frac{\text{Actual error}}{\text{real value}}\) x 100
= \(\frac{5}{250}\) x 100
= 2%

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