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Quantitative Aptitude :: Pipes & Cistern - Discussion

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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 Exputions P, Q and R respectively. What is the proportion of Expution R in the liquid in the tank after 3 minutes?

A7/11

B3/11

C5/11

D6/11

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