P and Q started a business by investing Rs.9000 and Rs.7500 respectively. After 5 months, Q increased his investment by a certain percentage such that at the end of 1 year, the profit shares of P and Q were equal. By how much percentage did Q increased his investment?
Let the increased investment amount of Q = Rs.x Ratio of profit shares of P and Q = (9000 x 12) : (7500 x 5 + 7y) = 1:1 So, 108000 = 45000 + 7x => x = 9000 Increase in investment of Q = 9000 – 7500 = Rs.1500 Required % = (1500/7500) x 100 = 20%
If x : y = 3 : 4, then (7x – 4y) : (3x + 2y) = ?
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