The simple interest on a certain sum for 7 months at 4 percent per annum is Rs. 124 less than the simple interest on the same sum for 15 months at 6 percent per annum. The sum is:

The simple interest on a certain sum for 7 months at 4 percent per ann

1.	The simple interest on a certain sum for 7 months at 4 percent per annum is Rs. 124 less than the simple interest on the same sum for 15 months at 6 percent per annum. The sum is:
A.	Rs. 2,560
B.	Rs. 3,300
C.	Rs. 2,400
D.	Rs. 2680
Answer» D. Rs. 2680