A borrow a sum of Rs.7800 from B at the rate of 16% p.a. for 4 years. He added some more money in it and lent it to C at 19% p.a. for 4 years. In this process he earns a total profit of Rs.1600. Find how much amount does he added?

874

Let the amount lent by A to C = X

Now ATQ,

(X × 19% × 4 ) - ( 7800 × 16% × 4) = 1600

76%X - 4992 = 1600

X =  \(\frac{6592 × 100}{76}\) = 8674

Amount added = 8674-7800 = Rs.874