Quantity-I: ‘A’ and ‘B’ started a business by investing Rs.‘x’(Take 'x' value as approximate) and Rs. 5,500, respectively. ‘A’ and ‘B’ invested their sum for 10 months and 12 months, respectively. If ratio of profit share of ‘A’ and ‘B’ is 4:5, respectively, then find the value of ‘x’? Quantity-II: If a = 6:7 and b = 2100, then find the value of ‘a’.