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Mathematics 7 Online
OpenStudy (anonymous):

Related Rates question. Water is being poured into a cone-shaped container. When the depth of the water is 2.5 inches, it is increasing at 3 in/min. At that time, how fast is the surface area, A, that is covered by water increasing? The hint given in the book says A = pi*r*s, which I assume is for the area covered in water.

OpenStudy (phi):

Yes, the "lateral area" of a cone is given by A = pi*r*s where s is the 'slant height" |dw:1460031255205:dw|

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