Q.
An experiment measures quantities a, b, and c, and then X is calculated fromX=a1/2b2c3. If the percentage errors in a, b, and c are ±1%,±3%, and ±2%, respectively, then the percentage error in X can be
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a
±12.5%
b
±7%
c
±1%
d
±4%
answer is A.
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Detailed Solution
X=a1/2b2c3ΔXX×100=12Δaa×100+2Δbb×100+3Δcc×100 =12×1+2×3+3×2=12.5%
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