5%Installment, x = Rs. 17500Total number of installments = 3Sum BORROWED (P) = [x/(1 + R/100)] + [x/(1 + R/100)2] + [x/(1 + R/100)3]⇒ P = [17500/(1 + 5/100)] + [17500/(1 + 5/100)2] + [17500/(1 + 5/100)3]⇒ P = 17500 × (20/21 + 400/441 + 8000/9261)⇒ P = 17500 × 2.72 = Rs. 47600Total value of THREE installments = 17500 × 3 = Rs. 52500∴ Interest charged = 52500 - 47600 = Rs. 4900