সব প্রশ্নে ফিরে যান
Math
In a certain country, a person is born every 7 seconds and a person dies in every 13 seconds. Therefore, the birth and death rates account for a population growth rate of one person every----
A) 4.5 seconds
B) 6 seconds
C) 15.17 seconds
সঠিক উত্তর
D) 20 seconds