Which of the following expressions represents the curved (lateral) surface area of a…

MATHEMATICS · Single correct · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes

Problem

Which of the following expressions represents the curved (lateral) surface area of a right circular cone with base radius rr and slant height ℓ\ell? (a) 12πrℓ\dfrac{1}{2}\pi r\ell (b) 2πrℓ2\pi r\ell (c) πrℓ\pi r\ell (d) πr (r+ℓ)\pi r\,(r+\ell)

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