Calculate the volume of full cone. For this you need to reproduce the cone surface upto the point where radius becomes zero.Then deduct the volume of the portion which is cut from the full volume.
You can't multiply the height to the average of bottom area and top area. Because area (pi.r^2) is the second degree function of radius, not first degree.
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dry concrete
When dealing with conrete the "slump" refers to how much will a sample sag, reduce in height in a given time frame. re: a 5" slump means that after removing the CYLINDER the concrete will lose 5 inches of elevation. The slump cylinder is the tool used to determine the slump of concrete.
No. Slump is "faster" but still at a very slow rate
Slump test
Slump