The simple interest and the true discount on a certain sum for a given time and

Question

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:

Options:

A . Rs. 1800

B . Rs. 1450

C . Rs. 1360

D . Rs. 6800

Answer: Option C

Sum = \(\frac{S.I\times T.D}{(S.I.)-(T.D.) }= \frac{85\times80}{(85-80)} =Rs. 1360\)

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