Sum of lengths of all edges of a cube is 84 cm, find its volume:-

686 cm3 343 cm3 171.5 cm3 514.5 cm3

343 cm3

Side of a cube = a Total edges in a cube = 12 ATQ, Sum of all edges = 84 12a = 84 a = 7 Volume of cube =  a3 =  73 =  343 cm3