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Three pipes A, B and C can fill a tank from empty to full in 30 miutes, 20 minutes and 10 minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P, Q and R respectively. What is the propotion of solution R in the liquid in the tank after 3 minutes? | |
A. | 5/11 [Wrong Answer] |
B. | 6/11 [Correct Answer] |
C. | 7/11 [Wrong Answer] |
D. | 8/11 [Wrong Answer] |