**A sum lent at simple interest amounts to Rs.6,240.80 in one year and to Rs.7,563.20 in 4 years. The sum (in Rs.) and the rate of interest per annum, respectively, are:** A) 5,800, 7.6% B) 6,200, 7.6% C) 5,800, 8.5% D) 6,200, 8.5% Click Link for Answer