問math 一題

40s run 360 degree
360/40s = routate / 4s
routate = 36 degree

D = 24m
r = 12m
Triangle side length = 12m x cos 36
Triangle side length = 9.7m

Rised height = OP - Triangle side length
Rised height = 12 - 9.7
Rised height = 2.3m