Question

The radii of frustum of a cone are 3cm & 2 cm , it's height is 21 cm . Finds it's volume

Answer 1

given:

F1=3cm

F2=2cm

h=21cm

volume of frustum=1/3πh(r1²+f2²+F1*F2)

1/3*22/7*21(3²+2²+3*2)

1/3*66(9+4+6)

22(19)

418cm²

Answer 2

I hope it will help you