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1. |
Q: Pipe K fills a tank in 30 minutes. Pipe L can fill the same tank 5 times as fast as pipe K. If both the pipes were kept open when the tank is empty, how much time will it take for the tank to overflow ? |
A. | 3 minutes |
B. | 2 minutes |
C. | 4 minutes |
D. | 5 minutes |
Answer» E. | |