Option C:
Height of the smaller cone is .
Solution:
Height of the larger cone = 5
Radius of the larger cone = 7
Radius of the smaller cone =3
To find the height of the smaller cone:
If two polygons are similar, then the corresponding sides are proportional to each other.
Do cross multiplication.
⇒ 15 = 7x
Option C is the correct answer.
Height of the smaller cone is .