The volume of cuboid =1bh Where, l= length, b= breadth and h= height
As shown in the above figures, Length of box =(24−2x) Breadth of box =(18−2x) Height of box =x The volume of the box =lbh ⇒(24−2x)(18−2x)(x)=640 From Option (3): If x=4 ⇒16×10×4=640