A sum of money amounts to Rs. 5580 at R% per annum simple interest in 6 years. The same sum will amount to Rs. 5130 at R/2% per annum simple interest in 7 years. What will be the simple interest on the same sum at 2R% per annum in 10 years?
1
Rs. 3000
2
Rs. 3200
3
Rs. 3400
4
Rs. 3600