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1. |
A tank can be filled by tap A in 5 hours and tap B in 4 hours. Tap C can empty the filled tank in 8 hours. When the tank is empty, all three taps are opened simultaneously, how long will it take to fill the tank completely? |
A. | \(\frac{10}{3}\) hours |
B. | \(\frac{40}{13}\) hours |
C. | 8 hours |
D. | \(\frac{10}{7}\) hours |
Answer» C. 8 hours | |