MATHEMATICS

JAMB 2017 - Question 9

Mathematics 2017 JAMB Past Questions - Question 9: if a rod 10cm in length was measured as 10.5cm, calculate the percentage error.

if a rod 10cm in length was measured as 10.5cm, calculate the percentage error.
if a rod 10cm in length was measured as 10.5cm, calculate the percentage error.
A:
B:
C:
D:
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Correct Answer

A

Explanation

percentage error = wrong value - actual value x 100 / actual value= (10.5 -10) x 100 / 10 = 0.5 x 100 / 10= 50/10 = 5%To calculate the percentage error, we can use the formula:Percentage Error = (|Measured Value - True Value| / True Value) * 100%In this case, the measured value is 10.5 cm and the true value is 10 cm.Percentage Error = (|10.5 - 10| / 10) * 100%                  = (0.5 / 10) * 100%                  = 5%So, the percentage error is 5%.