Bonsoir,
volume base
h =60-20 =40
85* 40 * 40 =>136 000cm³
Volume 1/2 cylindre
(3,14 * 20² * 85)/2 => 53 380cm³
Total:
136 000+ 53 380 = 189 380cm³
=> 189,38 L
= 189L
