Question

javed deposited 12000rup at 9 p.c.p.a in a bank for some years and withdrew his interest every year. at the end of the period he had received altogether 17400rup for how many years he deposited his money

Answer 1

17400-12000=5400 is the intrest
5400/12000=9/12*100=900/12=75%
75/9= 8.33
Means 8 year and 4 month

Answer 2

p=12000 rs
r=9%
t=1
so for 1 yr he recieves the SI =ptr/100 =12000*1*9/100 =1080 rs
so total amount he rcvs after 1 yr is 12000+1080=13080 rs
now altogether he recieves 17400 rs
so he continues for 17400/13080 yrs
= 435/327= 1.33yrs