- A54 minutes
- B81 minutes
- C24 minutes
- D16 minutes
Step-by-Step Solution
Flow is proportional to the pipe's area, i.e. to the diameter squared: ratio 4 : 9. The smaller takes .
Answer: B) 81 minutes
Two pipes have diameters 2 cm and 3 cm, with water flowing at the same speed. The larger fills a tank in 36 minutes. How long does the smaller take?
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