Question

The estimated distance of a place from point A is 80 km while the actual distance is 100 km. Then, the percentage error in measuring the distance is .

• A. 10%
• B. 15%
• C. 20%
• D. 25%

Answer 1

The correct option is C 20%

It is given that, from point A,
Estimated distance of a place = 80 km
Actual distance of the place = 100 km.

You know,
the error in measurement will be = $100-80$ km = $20$ km.

Percentage error is given by:
= $\frac{error}{Actualvalue}\times 100\%$

So, by putting the values, you get:
Percentage error $=\frac{20}{100}\times 100\%$
$=20\%$

∴ The percentage error in calculation is $20\%$.