2 cubes each of volume 64 cm3 are joined end to end. Find the surface area of the resulting cuboid.
Volume of cube = 64 cm3
We know that,
Side of cube = 
= 
= 4 cm
Length of new cuboid = 8 cm
Height of new cuboid = 4 cm
Width of new cuboid = 4 cm
We know that:
Surface Area = 2(lb + lh + bh)
= 2(8*4 + 8*4 + 4*4)
= 2*80
= 160 cm2
12