V= x*(10-2x)(8-2x)
for greatest volume, differentiate v w.r.t x and equate to 0,
dv/dx= (10-2x)(8-2x) + x(-2)(8-2x)+ x(10-2x)(-2)=0
you get x from solving the quadratic equation. volume will be max at that x
X=27
81 = 3x= 27
So x means 27
85/95 is equal to 0.8947
64/76 is equal to 0.842
Therefore, 85/95 is greater
