The difference in SI and CI on a certain sum of money in 2 years at 15% p.a. is Rs. 144. The sum is :
Rs. 6400
Given that n = 2 years ; r = 15 %
Let the Sum of money be P
C.I = A - P
I = A - P
Hence I = P(1+r100)n - P
C.I = P(1+15100)2 - P
C.I = (115P100)2 - P
C.I = (23P20)2 - P
C.I = 129P400
S.I = S.I = PRT100
= P×15×2100
= 3P10
C I - S I = 144
P[129400−310]=144
P[9400]=144
P=144×4009
=Rs.6400