Question

the population of a town increases 8% annually if its present population is 142560 what was it a year ago

Answer 1

let the population be X
X +8/100 ×x = 142560
X= 142560 ×100 /108
X= 132000

Answer 2

Solution :-

Given present population =142560

Increase in population annually =8%

Present population =   x(100+increase in population) /100

​  

 

where x is population last year

∴142560=   x(100+8) /100

​x=132000