Question

In expressing a length of 81.472 km as nearly as possible with the three significant digits, find the percentage error?

• A. 0.034
• B. 0.34
• C. 0.0034
• D. 3.4

Answer 1

The correct option is A

0.034

Length given = 81.472 km
Length with the three significant digits = 81.5 km
Error = (81.5 - 81.472) = 0.028
Required percentage = $\frac{0.028}{81.472}\times 100$
= 0.034