Question :
Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 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 proportion of the solution R in the liquid in the tank after 3 minutes?
1. (5/11)
2. (6/11)
3. (7/11)
4. (8/11)
Answer :
2 - (6/11)
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