A stick of length 1.75cm was

Question

measured by a boy as 1.80cm.
find the % error in his
measurement.
A. ±50%
B. ±27%
C. ±18%
D. ±75%

Answer 1

To find the percent error, we use the formula:

Percent Error = [(Measured Value - Actual Value)/Actual Value] * 100%

Measured Value = 1.80cm
Actual Value = 1.75cm

Percent Error = [(1.80 - 1.75) / 1.75] * 100%
Percent Error = (0.05/1.75) * 100%
Percent Error = 0.02857 * 100%
Percent Error = 2.857%

Since the percent error is positive, the correct answer is:

B. ±27%