Question

can anyone help me to solve this question ​

Answer 1

Answer:

the answer is 18,000

Step-by-step explanation:

If we imagine that the population of a year ago was = X

so,

the increase of population is = X+X×15/100

. . . .. . . = X+3X/20

= 23X/20

now,

according to the question,

23X/20=20700

or,23X=20700×20

or,X=414000/23

so,X=18000

so,the population of a year ago was 18,000