SOLUTION: An ice cream cone has radius 1 inch and height 4 inches, What is the number of inches in the radius of a sphere of ice cream which has the same volume as the cone?

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Question 1087585: An ice cream cone has radius 1 inch and height 4 inches, What is the number of inches in the radius of a sphere of ice cream which has the same volume as the cone?
Answer by ikleyn(52790) About Me  (Show Source):
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The volume of the cone is  V%5Bcone%5D = %281%2F3%29%2Api%2A1%5E2%2A4.


The volume of the sphere is V%5Bsphere%5D = %284%2F3%29%2Api%2AR%5E3.


They want you find the radius of the sphere  R  under the assumption that

V%5Bcone%5D = V%5Bsphere%5D,   or

%281%2F3%29%2Api%2A1%5E2%2A4 = %284%2F3%29%2Api%2AR%5E3.

It leads to the equation

4 = 4%2AR%5E3,  which  implies  R%5E3 = 1.


Hence, R = 1.


Answer. The equivalent radius of the sphere is 1 inch.