1.Soit x la hauteur du pavé
Volume pavé: 40.30.x = 1200.x
volume de la sphère: 4/3.pi.125 = 523,5987756...
Volume à remplir = 1200x - 523,5987756 = 30000 => 1200x = 29476,40122...
x = 24,56366
2.
1.46°
2.90° - 46° = 44°
OH/R = cos44° = > OH = R.cos44° =4587,949
4. HQ = R.sin44° = 4430,531
longueur = 2pi.HQ = 27837,84783
