38.The simple interest and the true discount on a certain sum for a given time and at a given rate are Rs. 85 and Rs. 80 respectively. The sum is
A. Rs.1800 B. Rs.1450
C. Rs.1360 D. Rs.6800
Answer:C
Sum =S.I x T.D/(S.I)-(T.D)
= (85x80/85-80)
= Rs.1360.
