Question

the population of a village is 20000. if the birth rate is 5% p.a. and death rate is 3 % p.a. find the population after 2 years

Answer 1

Answer:

20808

Step-by-step explanation:

birth rate = 5%

death rate = 3%

affective birth rate = 2%

popultion after 2 year = p(1+r)^2

                                     = 20000(1+2/100 )^2

                                     = 20000(1.02)^2

                                     = 20000(1.0404)

                                      = 20808

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Answer 2

Answer:

People borning --

P= 20000

R= 5%

T= 2 years

Si= (PRT)/100

= (20000*5*2)/100

= 2000

= 2000 have born

People death--

P= 20000

R=3

T=2

Si= (PRT)/100

= (20000*3*2)/100

= 1200

= 1200 people have died

Total→ 2000-1200= 800 people are increased

So 20000+800

= 20800 Is the population of the village after two years