It depends on what you mean by "cow". If you mean the mature female bovine, she can be any weight you want to sell her. Some folks like to feed their cows up to put a bit more fat on them so they sell as slaughter cows, but others feel that it's best to sell them ASAP.
But, if you mean a steer or heifer, especially beefers, they should be at the weaning age to be sold. Weight mostly depends on the breed or breed mix, as some 6 month old calves can sell heavier than others.
A Belgian Blue cow can weigh an average of around 1500 lbs.
The pectoral muscle on a cow will vary depending on the type of cow it is and how big it is. A cow's pectoral muscle can weigh a couple hundred pounds.
1/4 of a whole butchered cow
1000 lbs
about 16.6% of what it weighs on Earth
~1200lbs
Around 3 to 4 pounds, depending on the size of cow and what she's fed.
as much as the meat out of it as you can sell.
As Much As monkey poo with a moo moo cow in it
This depends on the weight of the truck and the type of truck, the size and weight of the cow, etc.
The heart of a cow weighs around 5 pounds or around 3 kilograms.
around 80-100lbs