Question

the slant height of Frustum of a cone is 4cm and the perimeter of its circular ends are 18cm and 6cm find the curved surface area of the frustum?

Answer 1

hey mate

here is your answer !!

let the slant height of the frustum be l and radii of the both ends of the frustum be r1 and r2.

Given l = 4cm

perimeter of one end of frustum which is circular in shape is

2πr1 = 18cm

r = 9/πcm and the perimeter of the others end of frustum which is also in circular in shape 2πr^2

r^2 = 3/πcm

CSA of the frustum


Using formula

π( r1+r2)l

π( 9/π+3/π)×4

12×4

48cm^2

be brainly

Answer 2

heyy

hope it's useful

follow me

give thanks