Question

In 1975, the consumption of water for human use was about 3850 cu.km/year. It increased to about 6000 cu.km/year in the year 2000. Find the per cent increase in the consumption of water from 1975 to 2000. Also, find the annual per cent increase in consumption (assuming water consumption increases uniformly).

Answer 1

Answer:

Step-by-step explanation:

Given  

In 1975, the consumption of water for human use was about 3850 cu.km/year. It increased to about 6000 cu.km/year in the year 2000. Find the per cent

We know that

Increase of consumption = increase / original x 100

                                        = 6000 – 3850 / 3850 x 100

                                        = 2150 / 3850 x 100

                                         = 4300 / 77

                                      = 55.84

We need to find for 25 year (2000 – 1975)

So percentage increase annually will be = 55.84 / 25

                                                             = 2.23 %