What are the dimensions of the cone used to measure the slump of fresh concrete?
1
Bottom diameter = 20 cm, top diameter = 10 cm and height = 30 cm.
2
Bottom diameter = 20 cm, top diameter = 15 cm and height = 15 cm.
3
Bottom diameter = 20 cm, top diameter = 15 cm and height = 20 cm.
4
Bottom diameter = 30 cm, top diameter = 20 cm and height = 20 cm.
5
None of the above