Question

the population of a town increases by 10% annually if the present population is 22000 find its population a year ago

Answer 1

let the population 1 year ago be x
then acc to ques
x+ x*10/100 = 22000

x+ x/10 =22000
11x/10=22000
11x. = 22000*10
x. =220000/11
x. =20000

so the population a year ago of the town was 20000