In this question, we have to estimate the number of breaths taken by a human being during an average life time .
And average respiratory rate of about 10 breaths per minute . And average age of a human being is 70 years .
In 1 minute, number of breaths are 10 breaths .
So in 1 day,number of breaths are

And for one year, it is

And in 7 years, it is
