passwella.
Menu

JAMB Mathematics 1983 Question 31

Question 31

Ratio, Percentages and Rates

If a rod of length 250cm is measured as 25cm long in error, what is the percentage error in measurement?

  1. A.55
  2. B.10
  3. C.5
  4. D.4
  5. E.2.
Show the answer and explanation

Answer: B (10)

Explanation

An error of 25cm on a true length of 250cm is 25/250 × 100 = 10%.