silverdiv......you are talking to the crock pot expert. You really want to cook your roast on low but if you have to cook it on high depending on the size of the roast it usually should take 3-4 hours.
The symbol for cubic meters is m 3. Less formally, cubic meter is sometimes abbreviated cu m. When calculating volume, it is important to realize that volume is proportional to the cube of the linear dimension.
Here's a cube: Because it's a cube, we know its sides are equal in length. In this case they are each a meter long. That means it's a cubic meter. But cubic meters are a unit of measurement, and can be used to describe the volume of arbitrary shapes, not just the size of a cube with sides of length 1 meter. Imagine there is a large room, and each side is 10 meters long, and the height is 5 meters.