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.
Square meter (metre in british spelling) is an area unit in metric system and commonly used in measuring the small lands, floor plans etc. The abbreviations are m 2  or sq m. Square foot is an imperial, US customary area unit.