Banker's Discount Practice Test 1

∵ Interest on Sum – T.D. = Interest on T.D.
∴ Rs. 67.20 – Rs. 60 = Interest on Rs. 60
Now, Rs. $7\frac{1}{5}$ = Interest on Rs. 60
∴ Rs. $67\frac{1}{5}$ = Interest on $\frac{60}{7\frac{1}{5}}\times 67\frac{1}{5}$
Hence, the required sum = $\frac{60\times 5}{36}\times \frac{336}{5}$ = Rs. 560