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A circle of radius 12 is cut out of a piece of paper. A 90 degree sector is then cut from this circle. This 90 degree sector is rolled into a cone. What is the volume of the cone?

 Sep 2, 2021
 #1
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Find perimeter of cone to be    1/4   *  pi * 2r = 6 pi

 

diameter of cone is then    6pi / pi = 6       radius = 3                Can you calculate volume from here ?   ( h of cone = 12 units)

 Sep 2, 2021
 #2
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  Sorry   SLANT height of cone = 12     

Guest Sep 2, 2021
 #3
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V = 1/3(9pi * √135)

 Sep 2, 2021
edited by Guest  Sep 2, 2021

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