Question

a closed box is made up of 2cm thick wood with external dimensions 84cm*75cm*64cm find the volume of the wood required to make the box

Answer 1

Sol:)  volume of wood=84*75*64
                      =403200 cm³
dimensions of inner wood because to calculate the volume of wood required we have to subtract the inner dimensions from outer dimensions.
  thickness of wood=2
   inner dimension= 84-2*75-2*64-2
                          =82*73*64
                           =371123 cm³
 volume of wood=403200-371123
                         =32077 cm³......................Hope u got it...