Question

what sum of money will amount to rs 4608 which was deposited for 2 year at 20%per annum

Answer 1

let the amount be N
so N*120*120/100*100=4608
which comes to 3200

N*120/100 first year will be the amount
2nd year the amount will become N*120*120/100*100=4608
so N=3200

Answer 2

let the principal be p
so
si= px2x20/100
=4p/10
according to the question
amount =p+si
4608. =p+4p/10
4608. =14p/10
4608x10/14=p
3291.42