Given:⇒Volume of cubes = 64 cm3⇒(Edge)3=64⇒Edge =4 cmIf cubes are joined end to end, the dimensions of the resulting cuboid will be 4 cm, 4 cm, 8 cm.Surface area of cuboids =2(lb+bh+lh)=2(4×4+4×8+4×8)=2(16+32+32)=2(16+64)=2(80)=160  cm2