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The shape of a glass (tumbler) is usually in the form of

  • A.A cone
  • B.frustum of a cone
  • C.a cylinder
  • D.a sphere

Answer: B

A drinking tumbler is circular at both the rim and the base, but wider at the top than at the bottom, and neither end closes to a point.

That is a frustum of a cone - a cone with its tip sliced off by a plane parallel to the base.

A full cone would taper to a point, and a cylinder would have the same width top and bottom.

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