If a cuboid of dimensions 10 cm×15 cm×5 cm is cut to form cubes of sides 5 cm, then what is the difference between the sum of the surface areas of these cubes and the surface area of the original cuboid?
+36916 Each smaller cube has a side area of 5x5 = 25 cm^2
in the original solid you can see 22 of these sides 22x25 = 550 cm2
Each smaller cube has 6 sides 6 x 25 =150 cm2 and there are 6 of them = 900 cm2
I think you can calc the diff ! 
