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The error in the measurement of radius of a sphere is 2%. The error in the measurement of volume is:

A2%
B4%
C6%
D8%
Answer & Solution
Correct answer: C. 6%
Volume of a sphere is proportional to $r^3$. **Therefore percentage error in volume is $3$ times the percentage error in radius: $3\times 2\%=6\%$.**
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