Question

1. Find the curved surface area of a frustum, having radii 7 cm and 14 cm respectively and slant height is 8 cm.

Answer 1

Answer:

     CSA of frustum = 528 cm²

Step-by-step explanation:

R = 14cm

r = 7cm

l = 8cm

CSA of frustum = πl(R+r)

                        = 22/7 × 8 (14+7)

                        = 22/7 × 8 × 21

                        = 22 × 8 × 3

                        = 528 cm²