A solid sphere of radius 3 cm is melted to form a hollow right circular cylindrical tube of length 4 cm and external radius 5 cm. The thickness of the tubeÂ is

A solid sphere of radius 3 cm is melted to form a hollow right circula

1.	A solid sphere of radius 3 cm is melted to form a hollow right circular cylindrical tube of length 4 cm and external radius 5 cm. The thickness of the tubeÂ is
A.	1 cm
B.	9 cm
C.	0.6 cm
D.	1.5 cm
Answer» B. 9 cm

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A solid sphere of radius 3 cm is melted to form a hollow right circular cylindrical tube of length 4 cm and external radius 5 cm. The thickness of the tubeÂ is

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