A sum of 1750 is divided into two pats such that the interest on the first pat at a 8% simple

Divide ₹ 3000 into two parts such that the simple interest on the first part for 4 years at 8% per annum is equal to the simple interest on the second part for 2 years at 9% per annum.

Divide ₹12000 onto two parts such that the simple interest on the first part for 2 years at 6% per annum is equal to the simple interest on the second part for 3 years at 8% per annum.

Rs. 1000 is lent out in two parts, one at 6% simple interest and the other at 8% simple interest. The yearly income is Rs. 75. The sum lent at 8% is:

Rs 1200 was divided into two parts and first was lent out at 8% per annum rate of simple interest for 5 years and the other part was lent out at 10% per annum years rate of simple interest for 4 years. If the interest on the first part is thrice that of second part, find the difference between two parts.