Answers

2016-03-09T15:37:28+05:30
Cone = 1/3 pi r^2 h = 1/3 pi r^3 (since height and radius equals)
hemisphere = 2/3 pi r^3
cylinder = pi r^2 h = pi r^3
ratio of the volumes are = 1/3 pi r^3 : 2/3 pi r^3 : pi r^3
                                         = 1/3 : 2/3 : 1
                                        = 1:2:3
 hence proved
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