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Question

The density of a cube is measured by measuring its mass ad length of its side. If the maximum errors in the measurement of its mass and length are 3% and 2% respectively, the maximum error in the measurement of density would be:

A
12%
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B
14%
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C
7%
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D
9%
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Solution

The correct option is D 9%
Density d=MassVolume
Or d=ma3
Percentage error in density % d= %m+3× % a
%d=3+3×2=9 %

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