Question

A cone is having its base radius 12cm and height 20cm if the top of this cone is cut in to from of a small cone of base radius 3cm is removed, then the remaining part of the solid cone becomes a frustum . calculate the volume of the frustum

Answer 1

Answer:

Step-by-step explanation:

volume of a frustum = 1/3πh(R^2 + r^2 + Rr)

R = 12. r. = 3. h = 20

1/3 x 22/7 (12x12 + 3x3 + 12x3)

22/21 ( 144 + 9 + 36)

22/21(189)

22 * 9

=198