While doing his physics practical, Idowu recorded a reading as 1.12cm instead of 1.21cm. Calculate his percentage error

  • A 1.17%
  • B 6.38%
  • C 7.44%
  • D 8.035%
  • E 9.00%
waec 1990mathematics

The correct answer is C. 7.44%

%error = \(\frac{1.21 - 1.12}{1.21} \times 100%\)

= \(\frac{9}{121} \times 100%\)

= 7.44%

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