A spherical iron ball 10 in. in diameter is coated with a layer of ice of uniform thickness. If the ice melts at a rate of 11 in. /min, how fast is the thickness of the ice decreasing when it is 4 in. thick? How fast is the outer surface area of ice decreasing?

Elementary Geometry for College Students
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ISBN:9781285195698
Author:Daniel C. Alexander, Geralyn M. Koeberlein
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Chapter8: Areas Of Polygons And Circles
Section8.4: Cicumference And Area Of A Cicle
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A spherical iron ball 10 in. in diameter is coated with a layer of ice of uniform thickness. If the ice melts at a rate of
3
11 in. /min, how fast is the thickness of the ice decreasing when it is 4 in. thick? How fast is the outer surface area of ice
decreasing?
Transcribed Image Text:A spherical iron ball 10 in. in diameter is coated with a layer of ice of uniform thickness. If the ice melts at a rate of 3 11 in. /min, how fast is the thickness of the ice decreasing when it is 4 in. thick? How fast is the outer surface area of ice decreasing?
The thickness of the ice is decreasing at a rate of
in. / min when the ice is 4 in. thick.
(Type an exact answer, using n as needed.)
Transcribed Image Text:The thickness of the ice is decreasing at a rate of in. / min when the ice is 4 in. thick. (Type an exact answer, using n as needed.)
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