Raj has invested Rs 12,000 at some rate of simple interest for 4 years and received Rs. 14,160. What will be the simple interest received by him after 4 years, if he increases the principal amount by Rs. 1,800 and the rate of interest by 4% points per annum?
1
Rs. 4,662
2
Rs. 4,992
3
Rs. 4,962
4
Rs. 4,692
5
Rs. 4,690