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.
A cow carries a calf for nine months, according to the Environmental Protection Agency. Females sexually mature at 15 months and are bred to optimally deliver their first calf at two years of age. After a brief two- to three-month interval, they are bred again.