Respuesta :

Answer:

38.73 cm

Step-by-step explanation:

Given:

  • R  = 30
  • X = 20
  • S = 40

Solution:

S² = (R - r)^2xh^2

(40)^2=(30-20)^2+h^2

1600=(10)^2+h^2

1600-100=h^2

h=√1500

h=10√15

h=38.73 (rounded to the nearest tenth)