Error in the measurement of radius of a sphere is $1\%$. The error in the calculated value of its volume is ......... $\%$
A$1$
B$3$
C$5$
D$7$
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B$3$
b (b) $V={\frac{4}{3}}{\pi}r^3$
$\%$ error is volume $ = 3 \times \% $ error in radius $ = 3 \times 1= 3\%$
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