yang bisa tolong yaaaa

V = p × l × t
V = (40 - 2x) (25 - 2x) ( X )
V = ( 1000 - 80x) ( 50x - 4x^2) X
V = 1000x - 130x^2 + 4x^3
V = 0
1000 - 260x + 12x^2 = 0
3x^2 - 65x + 250 = 0
(3x - 50x) ( x - 5 ) = 0
x = 50/3
x = 5 cm
Tingginya 5 cm