A Sum of money is invested in two parts in ratio of 3 : 5 both at simple interest. 1st part is invested at 16% and the 2nd part is at 12%. If the difference in simple interest is 1800, find the total sum of money invested. It is given that both parts are invested for 3 years
1
40,000
2
50,000
3
60,000
4
20,000
5
None of these