Question

Find the percent error of the measurement 7 cm.

Answer 1

The answer is 7.14 :)

Answer 2

The percent error of the measurement 7 cm is 7.14%.

Explanation:

Given : Measurement 7 cm

To find : The percentage error of the given measurement.

Solution :

First we find the error in the measurement.

Measuring to the nearest centimeter means the true value could be up to half a meter smaller or larger.

i.e It is upto 0.5 (between 6.5 and 7.5)

Measurement - 7 ±0.5 cm

Absolute Error = 0.5 cm

Relative Error =
`(0.5)/(7)=0.0714`

Percentage Error =
`0.0714* 100=7.14\%`

Therefore, The percent error of the measurement 7 cm is 7.14%.