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In expressing a length 810472 km as nearly as possible with three significant digits , find the percentage error.

A. 34%

B. 0.34%

C. 0.034%

D. .32%

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Correct Answer : C.


Error = (81.5 – 81.472)km = 0.028.


Required percentage = [(0.028/81.472)*100]% = 0.034%.

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