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.
Occasionally a producer will let a cow, particularly one that is a foundation cow, live to old age. How old is old age depends on the cow: some will live until they are 15 to 20 years of age or more. Others may only live until they are 3 to 5 years because they had to be culled for health, temperament or unproductive reasons and sent to slaughter. Hannah Williams.