- A15 hours
- B10 hours
- C12 hours
- D20 hours
Step-by-Step Solution
gives , i.e. makes larger negative). Smaller takes 15 hours.
Answer: A) 15 hours
Two pipes together fill a tank in 6 hours. The larger pipe alone takes 5 hours less than the smaller pipe.
Let the smaller pipe take hours, larger hours. From , form a quadratic and solve by factorisation.
How many hours does the smaller pipe take alone?
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