- A40 min
- B12 min
- C30 min
- D20 min
Step-by-Step Solution
Net L/min. Half the tank is 480 L: min. (40 min fills the whole tank; 12 min ignores the outlet.)
Answer: D) 20 min
The 960-litre tank in the figure is half full when both pipes are opened. How long until it is full?
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