P started a business with an investment of Rs.15000, after 6 months Q joined him with Rs.18000 and after another 6 months R joined them with Rs.22000. If after end of two years profit share of Q is Rs.8100, then what is the total profit earned by them?
Ratio of profit share of P, Q and R = 15000 x 24 : 18000 x 18 : 22000 x 12 = 30:27:22 Required amount = 8100 x (79/27) = Rs.23,700
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