- A4 h
- B8 h
- C12 h
- D16 h
Step-by-Step Solution
The two smaller pipes together give parts, the same as the largest pipe, so they also take 8 h. (16 h halves the flow instead.)
Answer: B) 8 h
Three pipes have flows in the ratio 1 : 2 : 3. The largest pipe alone fills a tank in 8 hours. How long do the two smaller pipes take together?
Competition practicePipes & Cisterns
Master this topic in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Pipes & Cisterns practice questions
More Pipes & Cisterns practice
A cistern is three-quarters full. Pipe A can fill the empty cistern in 12 minutes and…A full 7,200-litre tank has an inlet bringing 60 litres per minute and two outlets each…Pipe A can fill a tank in 10 hours and pipe B in 15 hours. Because of a leak, the two…A tank can be filled by pipe A in 2 hours and by pipe B in 6 hours. At 10 a.m. A is…Once a pipe has been open for 2 hours, its rate falls by one-third because of a clog.…