Sir it is a very urgent question on maths project,please help us to do it????

 if we cut  1 cm on the corners then the volume  will be  8x8x1 = 64 cm^3

  if we cut 2  cms . the volume = 6x6x2= 72 cm^3

 if we cut 0.5 cms the volume =  9 x9x0.5= 40.5 cm^3

 if we cut  3 cms the volume= 4x4x3=48  cm^3

  if we cut 4 cms the volume= 2x2x4= 16 cm^3

 if we cut 1.5 cm , the volume- 7x7x1.5 = 73.5cm^3

 if we cut 2.5 cm, the volume= 5x5x2.5 = 62.5 cm^3

 SO , IF WE CUT 1.5 CMS ON THE 4 CORNERS THE VOLUME OF THE BOX WILL MAXIMUM