This question is essentially asking you to find the surface area of the box. The formula for SA on a rectangular prism is: 2(L*W+L*H+W*H) L=Length W=Width H=Height Lets input the information we know: 2(20*8+20*30+8*30) Follow BEDMAS 2(160+600+240) 2(760+240) 2(1000) 2*1000 =2000
The box will need 2000 centimeters squared of material.
