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One pipe P is 4 times faster than pipe Q and takes 45 minutes less than pipe Q. In what time the cistern is full if both the pipes are opened together? |
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Answer» 8 minutes take 4x minutes to fill the tank `4x-x+45, x=15` So P will take 15 minutes and Q will take 60 minutes to fill the tank. Both will fill the tank in `(60xx15)/75 = 12` minutes |
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