No. She needs to stop and rest to chew cud and lay down for an hour or more before going back to eating again. She does this every 2 to 4 hours, every day, depending on her routine schedule. She also needs to take time off to find and drink water, socialize with other cows, etc. If she's a dairy cow, she also takes time off to go to the milk parlour to get milked out. If she's a beef cow with a calf, she needs to take the time to allow her calf to nurse.
Muslims, first of all, can eat cow. Only pork and alcohol is forbidden.
Cows, like all animals, do not eat water, they drink it. And cattle typically consume around 10% of their body weight in water per day.
16-18 hours.
50 tons a day
Cows don't eat such a thing as "lunch." They eat whenever they want, no matter what time of the day it is.
no not at all
Thus all cows are herbivores.
7 pounds.
Maintenance requirements are 2.5% of a cow's body weight in dry matter ration per day.
Humans don't digest all plant material very well. If you can get nutrition out of it, it's more efficient if you can eat the plant material directly. If you have to feed it to a cow, and then eat the cow, a lot of the nutrition will be lost in the transition. But if you can't get nutrition out of it, and the cow can, then feeding it to a cow would be sensible.
No.
There's no such thing as an "organic cow." A cow is a cow, regardless. She will eat what "normal" cows eat, which is defined in the related question posted below.