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Problem

The radius of the base of a cylinder is decreasing at a rate of 12 kilometers per second.
The height of the cylinder is fixed at 2, point, 5 kilometers.
At a certain instant, the radius is 40 kilometers.
What is the rate of change of the volume of the cylinder at that instant (in cubic kilometers per second)?
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Choose 1 answer:
The volume of a cylinder with radius r and height h is pi, r, start superscript, 2, end superscript, h.
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