- A15 h
- B7.5 h
- C9 h
- D10.5 h
Step-by-Step Solution
First half at : 7.5 h. Second half at : 3 h. Total 10.5 h. (15 h has one inlet throughout.)
Answer: D) 10.5 h
An inlet fills a tank in 10 hours, and a leak would empty the full tank in 30 hours. When the tank is half full, a second inlet identical to the first is opened. How long does the empty tank take to fill?
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