Time period for Ragini = (18 - 14) = 4 years Time period for Misthi = (18 - 16) = 2 years So, interest paid by Ragini = 21,600 x 4 x 0.18 = Rs. 15,552 CI = P x (1 + r/100)t - P And interest paid by Misthi = 51,200 X (9/8) 2 - 51,200 = Rs. 13,600 Therefore, required difference = Rs. 15,552 - 13,600 = Rs. 1,952