Will every solid with the same dimensions have the same density. explain briefly please
Density is defined as mass per unit volume. In other words, you take the mass divided by the volume (its dimensions). This means that if two objects have the same dimensions, but different masses, they will have different densities.
For example, consider a block of concrete or a block of wood which are both the same size. Obviously, the concrete will be heavier, so it would also have a greater density.