In England and Wales it is called Year 6 and the pupils are usually 10 to 11 years old. Often it is the seventh year of school; the years being called Reception, Year 1, Year 2, Year 3, Year 4, Year 5 and Year 6.
Quick Answer. According to Animals Australia, the natural lifespan of a dairy cow is approximately 20 years. The average lifespan of a beef cow is 15 to 20 months.
What is the gestation period of a cow? According to the U.S. Environmental Protection Agency, the average gestation period for cows is nine months. Pregnancy in cows lasts 280 days, on average; however, cows can give birth up to 290 days after conception, according to Merck Animal Health.