RĂ©ponse :
Explications Ă©tape par Ă©tape
1/ V = B * h
V = (π D²) / 4 * h
V A = ( π * 10² ) / 4 * h
⇔ V A ≅ 78,54 h
V B = ( π * 7² ) / 4 * h
⇔ V B ≅ 38,48 h
V C = ( π * 5² ) / 4 * h
⇔ VC ≅ 19,635 * h
2/ 78, 53 > 2 * 38,48
⇔ 78,53 > 76,96
V A > 2 V B
78,54 = 19,635 * 4
⇔ 78,54 = 78,54
V A = 4 V C
