- A7.2 h
- B14.5 h
- C14 h
- D15 h
Step-by-Step Solution
Each 2-hour cycle fills . After 7 cycles (14 h): . B then needs h. Total 14.5 h. (7.2 h is both open together.)
Answer: B) 14.5 h
Taps A and B can fill a tank in 12 and 18 hours. They are opened alternately for an hour each, starting with B. How long will the empty tank take to fill?
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