2017
Mathematics
JAMB
If a rod 10cm in length was measured as 10.5cm, calculate the percentage error
A.
5%
B.
10%
C.
8%
D.
7%
Correct Answer: 5%
Explanation
Actual measurement = 10cm approximated value of measurement = 10.5cm % error = (Actual measurement − Approximated/Actual measure) × 100 = (10−10.5)/10 × 100 = −0.5/10 × 100 ignore -sign i.e take absolute value = 0.5/10 × 100 = 5 %
Actual measurement = 10cm approximated value of measurement = 10.5cm % error = (Actual measurement − Approximated/Actual measure) × 100 = (10−10.5)/10 × 100 = −0.5/10 × 100 ignore -sign i.e take absolute value = 0.5/10 × 100 = 5 %THIS WEEK's
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