Discussion :: Water Supply Engineering - Section 7 (Q.No.5)
|Jajhjiik said: (Aug 14, 2015)|
|According to incremental increase method, yn = yo+nr+n(n+1)/2xk.
yo = Initial population n = No of decades k = net incremental increase.
r = avg increase in population.
So, y 2020 = 50000+7500x2+3x750 = 67250.
Answer given is wrong.
|Grace said: (Mar 29, 2017)|
|By incremental increase method, Pn = P + n (Average Increase+ Incremental Increase)
Given: P=50,000 ; n=2 ; Average Increase = 7500 ; Incremental Increase = 750,
Hence P2=50000+2(7500+750) = 66,500.
|Ghosh said: (Nov 14, 2017)|
|Yes 67250 is the right answer here.|
|Satish Verma said: (Apr 18, 2018)|
|67250 is the right option.|
|Jignesh said: (Sep 5, 2018)|
Can you please explain how came 2 ad 3?
|Girma B. said: (Feb 26, 2019)|
|The final answer is 67250.|
|Subhasmita Patra said: (Jul 14, 2019)|
|The formula for geometrical increase method is;
IG= average percentage per decade.
n= no of decad.
|Mahesh Sinh said: (Mar 31, 2020)|
|Pn = P+n(Ia+Iinc),
Pn = 5000+2(7500+750).
|Prashanth said: (Apr 20, 2020)|
How it came 3? please explain sir.
|Renis@Gajipara said: (Aug 26, 2020)|
|The population of the city based on the incremental method, in the year 2020.
i = 7500 & r = 750.
Pn = P + (i+r)n.
= 50000 + (7500+750)*2.
Pn = 66500.
P = Present population in 2000.
i = avg. increase in population.
r = avg. incremental increase.
n = Number of decades.
|Pooja said: (Sep 11, 2020)|
|Pn = Po + nx + [(n(n+1))/2]*y.
n = no Of decades,
x = avg increase in population,
y = avg. incremental increase,
Po = initial population.
|Anirban Roy said: (Sep 23, 2020)|
|Yes, you are right @Pooja. So,
Pn = 55000 + 2 * 7500+(2 * 3÷2) * 750 = 67250.
|Noini said: (Dec 3, 2020)|
|Avg increase is 7500 calculated for 8 decades.
Then the total increase in population from 1930 is 7500x8=60000. If increase itself is 60000, what is the actual population in 1920 initially then? How can the population in 2000 be very less=50000?
Please anyone explain.
|Smith said: (Dec 24, 2020)|
|Thanks all for eplaining the answer.|
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