- A36 min
- B42 min
- C27 min
- D45 min
Step-by-Step Solution
Flows ∝ , total 49. The 6 cm pipe gives of the combined flow, so together they take min.
Answer: A) 36 min
Three pipes have diameters 2 cm, 3 cm and 6 cm, and the flow through each is proportional to the square of its diameter. The widest pipe alone fills a cistern in 49 minutes. How long do all three take together?
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