Question

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Answer 1

This is a diff calculus problem. Have you done this type before?

Answer 2

\[V_{cow} = \frac{4}{3}\pi r^3\]

\[\dot V_{cow} = \frac{4}{3}\pi (3r^2 \dot r)\]

that's the method,....

Answer 3

Don't you love it when they post a question and then just disappear !