Karthi had RS.5000 with him. he lent a part of 12% per annum simple interest and the remaining at 15% per annum. his total annum income was Rs.700.find the sum lent at12% per annum.

Answer 1

If x at 12%, then

.12x + .15(5000-x) = 700

Answer 2

X=5000/3

= Rs. 1666.67 is the sum lent at
12% p.a.