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.
If she goes for longer than that she gets culled. In her lifetime, well that depends on how long she lives. Heifers become cows when they c â¦ alve at around 24 to 30 months of age (depending on the breed), and the average cow lives to 15 to 20 years of age, so that mean a cow will have 13 to 18 calves in her lifetime.f she goes for longer than that she gets culled. In her lifetime, well that depends on how long she lives. Heifers become cows when they c â¦ alve at around 24 to 30 months of age (depending on the breed), and the average cow lives to 15 to 20 years of age, so that mean a cow will have 13 to 18 calves in her lifetime.