(b) A city have population of 500000 capita and current per capita demand is 165
ID: 702049 • Letter: #
Question
(b) A city have population of 500000 capita and current per capita demand is 165 li tre/day. The population increases by 1%. The average consumption ofwater increases by 22% in summer time, Calculate the average day demand for this city after 50 years in normal days and summer days (15 points) c) A city have an area of 200 Hectare. Its population density in 1970 was 250 Capita/km2 and increased with amounts of 50, 70, 85, 90 Capita/km2 in years of 1980, 1990, 2000 and 2010 (15 points) Calculate also the max daily and hourly consumption. respectively. Estimate the number of people for this city in year 2040.Explanation / Answer
Solutions 1:
Present total consumption= 500000*165=82500000 litre/day
Population increases by 1 percentage annually
So population after 50 years=500000(1+0.01)^50=822315.91
So consumption after 50 year in normal period is 822315.91*165=135682125.2
Again consumption rate is increasing by 22% in summer time
Thus per capita consumption after 50 years is 165(1+0.22)^50=20796.56
Thus consumption in summer time=822315.91*20796.56
Maximum daily factor is 1.5
And hourly factor is 1.8
It's need to be multiplied
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