Trao121 Trao121 28-02-2024 Mathematics contestada A certain sum amounts to Rs. 720 in 2 years and to Rs. 1020 after 7 years at simple interest. Find the sum and the rate of interest p.a? a) Rs. 800, 8% b) Rs. 600, 10% c) Rs. 700, 7% d) Rs. 500, 10%