Question

The population of a town increases 15% every year. If the present population is 20700, find the population
a year ago​

Answer 1

Answer: the population a year before was 18000.

Step-by-step explanation:

rate of increase in population (R) = 15%

time= 1 yrs.

since, the population given is of present (A)= 20700

population a year ago (P)= ?

we know,

A = P (1+r/100)^{n}

20700 = P [(1 + 15/100)^{1}]

20700 =P (1+ 3/20)

20700 = p {(20+3)/20}

P = 20700 (20/ 23)

P = 20700*20/23

P = 900*20

P = 18000 (ans) solved.

Step-by-step explanation: