Question

In 2009, the life expectancy is about 80 years. Assume that, due to modern advances, life expectancy gains 5.5 years every decade. From 2009, in how many years would humanity achieve a life expectancy of 110 years?

Answer 1

60 years

Explanation:

2009 -> 80 years

+5.5

2019 -> 85.5 years

+5.5

2029 -> 91 years

+5.5

2039 -> 96.5 years

+5.5

2049 -> 102 years

+5.5

2059 -> 107.5 years

+5.5

2069 -> 113 years