Percentage Practice Test 5 with solutions

Question : 38 of 40

Marks: +1, -0

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

Solution:

Change in length = 81.5 – 81.472 = 0.028 km
Hence, required percentage

= 0.028/81.472×100 = 0.034%

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