the interest incurred on rupees 200 for one year is rupees 15 plot the interest on a graph for different annual periods and hence obtain the interest on rupees 750 for 4 years
P =RS 200
T = 1YEAR
SI = 15
THE SI = PTR/100
R = 100I /PT
R = 15/2 = 7.5%
IF P = RS 750 T= 4YEARS R = 7.5%
I = RS225