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Questions  

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

a
7%
b
5%
c
1%
d
9%

detailed solution

Correct option is D

We know density,ρ=MV=[M]L3∴ Δρρ×100=ΔMM×100+3ΔLL×100=3%+3(2%)=9%

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