Two cubes of thire sides ratio 2 : 3. Find its cube volumes ratio

Three cubes of sides 5 m, 4 m, and 3 m are melted to form a new cube. Find the surface of the new cube

The diagonal of a cube is 8√3. find its volume and surface area. 

The surface area of a cube is 486 Cm³. Find its volume

The volume of cube is equal to the surface area of that cube. Then find the distance of side of the cube

The lateral surface area of cube is 100 sq.units. find the volume of cube