Posted by **lisa** on Saturday, March 16, 2013 at 10:57pm.

I have spilled 200cm^3 of vegetable oil on my kitchen floor. The resulting oil slick can be modeled as a cylinder with a very small height; the height is decreasing at a rate of 1/1000πcm/sec and the radius is currently 50cm.

How quickly is the radius of the oil slick increasing, in cm/sec?

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