Question

the interest of which sum is rs 90 at 6 percent annual interest in 3 years

Answer 1

SI=(P×R×T)/100=
90=p*×6×3/100
9000=18×p
P=9000/18=500

Answer 2

90 - 6% - 3 yrs
15 - 1% - 3 yrs
5 - 1% - 1 yr
that is 100% = 500