Mathematics · Mensuration

A solid sphere of radius 9 cm is melted to form a hollow, right circular cylindrical tube of length 12 cm and external radius 15 cm. The thickness (in cm) of the tube is:

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A solid sphere of radius 9 cm is melted to form a hollow, right circular cylindrical tube of length 12 cm and external radius 15 cm. The thickness (in cm) of the tube is:

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A solid sphere of radius 9 cm is melted to form a hollow, right circular cylindrical tube of length 12 cm and external radius 15 cm. The thickness (in cm) of the tube is:

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