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Question

The base radius and height of a right circular solid cone are 12cm and 24cm, respectively. It is melted and recast into spheres of diameter 6cm each. Find the number of spheres so formed.

A
48
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B
40
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C
32
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D
24
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Solution

The correct option is C 32
Radius of a right circular solid cone =12cm
Height of a right circular solid cone =24cm
Sphere diameter =6cm
Volume of right circular solid cone =V=N× Volume of sphere
V=13πr2h=N×43πr3
13×122×24=N×4333
N=32

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