Answer:
C
Step-by-step explanation:
The smaller cone and larger cone are similar with
ratio of heights = 63 : 189 = 1 : 3
diameter of smaller cone is 24, hence radius is 12
radius of larger cone = 3 × 12 = 36
circumference (C) is calculated as
C = 2πr ← r is the radius
C = 2π × 36 = 72π ≈ 226 mm → C
