Answer:
The relative growth rate is 18.75%.
Explanation:
If the world population was 2.560 million in 1950 and 3.040 million in 1960, it means that there was a growth of 480 million people in 10 years. Thus, it is a growth of 18.75%, according to the following calculation:
2,560 = 100
480 = X
(480 x 100) / 2,560 = X
48,000 / 2,560 = X
18.75 = X
Therefore, if this growth rate were to be maintained, in subsequent years the world population would evolve as follows:
1970: 3,040 x 1.1875 = 3,610 million inhabitants
1980: 3,610 x 1.1875 = 4,286 million inhabitants
1990: 4,286.8 x 1.1875 = 5,090 million inhabitants