Tap A fills a tank in 2 hours. Outlets B and C
can empty the tank in 4 hours and 6 hours
respectively. If the tank is empty and A and B
are turned on, how long will it take to fill up?
After the tank is full, A, B and Care all turned on.
How long will the tank take to empty?
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Answer:
1)4hours 2)10 hours
Step-by-step explanation:
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