**A sum at simple interests at 13 ½ % per annum amounts to Rs.2502.50 after 4 years find the sum.**

1725

1625

1825

1234

B. 1625

Let sum be Rs. x then , S.I.=Rs.(x*(27/2) *4*(1/100) ) = Rs.27x/50

amount = (Rs. x+(27x/50)) = Rs.77x/50

77x/50 = 2502.50

x =$\frac{2502.50*50}{77}$ = 1625

Hence , sum = Rs.1625.