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Question

The density of a cube is measured by measuring its mass and the length of its sides. If the maximum errors in the measurement of mass and length are 3% and 2%, respectively, then find the maximum error in the measurement of the density of cube.

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Solution

Maximum error in mass Δmm×100=3%
% error in length =2%
Density =MassVolume
ΔPP×100=[Δmm+3Δll]×100
=(3+3×2)%
maximum error in density =9%

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