ConceptFrustum of a Cone

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#### Question

A *fez*, the cap used by the Turks, is shaped like the frustum of a cone (see the figure given below). If its radius on the open side is 10 cm, radius at the upper base is 4 cm and its slant height is 15 cm, find the area of material use for making it. [use π=22/7]

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#### Reference Material

Solution for concept: Frustum of a Cone. For the course CBSE