Question

The slant height of a frustrum of a cone 4 cm the radii of two circular ends are 21cm and 14cm . Find the CSA of frustum

Answer 1

Answer:

Step-by-step explanation:

L=4cm, R=21cm, R=7cm

CSA of frustum= πl(R+r)

CSA=22/7 × 4 ×(21+7)

CSA=22/7 × 4 ×28

CSA= 22×16

CSA = 352 sq.cm(ANS)

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