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CBSE XII
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Math
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Application of Derivatives
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Q)
The radius of a circle is increasing at the rate of $0.7\; cm/s$. What is the rate of increase of its circumference?
$\begin{array}{1 1} 1.2\pi \;cm/s \\ 1.4\pi \;cm/s \\ 1.4m/s \\ 14cm/s \end{array} $
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