simple compound interest

Question

Sum of money becomes $17640 in 2 years and $18522 in 3 years at same rate of interest,compound annualy.find the sum and the rate of interest p.a

Answer 1

??????????????????? "simpel-kompound" ???????????????

???????????? "annually" ???????? yu meen "per yeer" ?????????

????????? "sum av munee" ??????? yu put up do ???????

apparentlee yu wann kompound bi yeer

2 yeers it gro tu 17,640$ & 3 yeers=18,522$

start$*(1+%)^2=17,540

start$*(1+%)^3=18,522

18,522 / 17,540=1.05, so it be 5% interest

(1.05)^2=1.1025

start $=17640/1.1025

start=16,000