P and Q started a business by investing Rs.8000 and Rs.6400 respectively. After 6 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 = (8000 x 12) : (6400 x 6 + 6y) = 1:1 So, 96000 = 38400 + 6x => x = 9600 Increase in investment of Q = 9600 – 6400 = Rs.3200 Required % = (3200/6400) x 100 = 50%
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