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Q.

A physical quantity A is related to four observable a, b, c and d as A=a2b3cd . The percentage errors of measurement in a, b, c and d are 1 %, 3 %, 2 % and 2 % respectively. What is the percentage error in the quantity A ?

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a

12 %

b

7 %

c

5 %

d

14 %

answer is D.

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Detailed Solution

Percentage error in A =2×1+3×3+1×2+12×2%=14%
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