Riya invested Rs. 'a' and Rs. 'a + 7000' in two investment plans for three years. The first plan offered a simple interest rate of 15%, while the second plan had a rate of 12% per annum. If she received Rs. 3000 more from the first plan than the second one, calculate the value of 'a'.
1
Rs. 30199.2
2
Rs. 61333.33
3
Rs. 92920.5
4
Rs. 51252.66
5
Rs. 99899.01