A 1000 pound cow grazes on grain for 3 years. A cow eats 3% of her body weight per day. if the grain has 4 calories per gram, how much energy is used by the cow over its lifetime? (1kg=2.2lbs)
Cow's weight in Kilogram=1000 / 2.20=454.55 Kg X 1,000 grams=454,550 weight of the cow in grams.
454,550 X .03=30 grams of grain that the cow eats every day.
Then, 30 X 4=120 calories per day that the cow consumes.
3 years X 365 days=1,095 Lifespan of the cow in days.
1095 X120 calories per day=131,400 calories that the cows consumes in her lifetime.
