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.
According to Szabo (szabÃ³), 1993 hereford And angus cows were culled at the age of around 8. Years (selymes) 1996 determined the minimal life span of beef cow lines as 8 years, but in his, opinion 10 years would be. optimalor instance, cows born in April calved at an average age of 2.59 years, whereas those born in December did at an average age of 2.77 years. The difference is 0.18 years, i.e. 2.16 months. CONCLUSIONS The conclusions of our analysis generally support the results of earlier studies and practical observations.