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

Mathematics
JAMB 1983

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
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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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