G = (50 - 2x) * (70 - 2x) = 4x2 - 240x + 3500
V = G * x = (4x2 - 240x + 3500) * x = 4x3 - 240x2 + 3500x
V' = 12x2 - 480x + 3500 = 0
x1 = 9.591670002 (Maximum)
x2 = 30.40832999 (Nicht im Definitionsbereich)
V = 4(9.59)3 - 240(9.59)2 + 3500(9.59) = 15021 cm3
Skizze:
