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JAMB 2017 · UTME (set 2) · Q22

If a rod 10 cm10\text{ cm} in length was measured as 10.5 cm10.5\text{ cm}, calculate the percentage error.

Worked solution (try it first)
  1. The error is 10.5−10=0.510.5 - 10 = 0.5 cm.
  2. Divide by the true length and multiply by 100: 0.510×100%=5%\frac{0.5}{10} \times 100\% = 5\%, option A.

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