The circumferences of the two circular ends of a frustum of a cone are 18 cm and 6 cm

MATHEMATICS · Subjective · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes

Problem

The circumferences of the two circular ends of a frustum of a cone are 18 cm and 6 cm. If the slant height of the frustum is 4 cm, find its curved surface area.

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