Question

If a person is born every 5 seconds and a person dies every 12 seconds, then how many seconds does it take for the population to grow by one person? Please explain as well.

Answer 1

As per the problem

A person is born every 5 seconds and a person dies every 12 seconds.

Here the LCD of 5 and 12 is 60.

The number of person born in 60 seconds
`=(60)/(5)=12\\`

The Number of person died in 12 seconds
`=(60)/(12)=5`

Hence Population increase in 60 seconds is
`=12-5=7\\`

Hence time required to increase the population by one
`=(60)/(7) \ \ seconds\\`