If the banker’s discount on a certain amount of money is Rs. 80 and the true discount on the same amount for the same time duration is Rs. 64, then the amount due is:

Solution (By Examveda Team)

$$\eqalign{ & {\text{Amount}}\,{\text{Due}} \cr & = \frac{{B.D. \times T.D.}}{{B.D. - T.D.}} \cr & = \frac{{80 \times 64}}{{80 - 64}} \cr & = {\text{Rs}}{\text{.}}\,320 \cr} $$