(C3SE 2012
4. A solid metal cone with radius of base 12 cm and height 21 cn is melted
to form solid spherical balls of diameter 6 cm each. Find the number of
balls thus formed.
(C358 2009
5. The radii of internal and external surfaces of a hollow spherical shell are
3 cm and 5 cm respctively. It is melted and recast into a solid Cylinder of
diameter 14 cm. Find the height of the cylinder.
C380
22
20 3.
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