SBI PO 09 Jun 2019 Papers

Rs. x was invested in scheme A (offering simple interest at the rate of R% p.a.) and Rs. ‘2x’ was invested in scheme B (offering simple interest at the rate of (R + 10)% p.a.). If the respective ratio between the interest received from scheme A after 3 years and that received from scheme B after 4 years was 9 : 40, what was the value of R ?