A toy manufacturer produces wooden building blocks in three shapes for a new playset. The cubical block has a side length of 6 centimetres. The cuboidal block measures 8 centimetres in length, 6 centimetres in width, and 4 centimetres in height. The spherical block, a solid ball, has a radius of 7 centimetres. Throughout this passage, use pi = 22/7.
The manufacturer packs one of each of these three blocks into a rectangular playset box measuring 40 centimetres in length, 30 centimetres in width, and 20 centimetres in height, and wants to know how efficiently the box's volume can be used compared to the space the blocks themselves occupy.
Separately, the manufacturer is also considering doubling the side length of the cubical block for a "jumbo" edition of the playset, and wants to compare the jumbo block's volume and surface area to those of the original cubical block before finalising the new design.