Question

A spherical metal ball is melted into a shape of cylinder mounted by a cone such that the base of cone exactly overlaps the top base of cylinder. The diameter of the cylinder and sphere is 4.2 m each. What is the height (in
m) of the cone if the height of cylinder is 1.4 m? 

A 0.7
B 1.4
C 4.2
D 2.1
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