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Two pipes A and B can fill a tank in 20 minutes when opened simultaneously. If pipe A alone takes 60 minutes to fill the tank, how much time will pipe B alone take to fill the tank? | |
A. | 60 minutes [Wrong Answer] |
B. | 40 minutes [Wrong Answer] |
C. | 30 minutes [Correct Answer] |
D. | 20 minutes [Wrong Answer] |