- A32 min
- B40 min
- C26 min
- D52 min
Step-by-Step Solution
Take units/min, units/min, together 13. Tank = units. alone: min (A alone 32.5 min).
Answer: D) 52 min
Pipe A is 60% more efficient than pipe B. Together they fill a tank in 20 minutes. How long would B alone take?
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
The figure shows a 2,400-litre tank. Inlets A and B and the outlet C are all opened on…Pipe A fills a tank in 15 minutes and pipe B in 10 minutes. A runs alone for the first 5…A tank is one-fourth full. Two pipes that can fill it in 15 minutes and 20 minutes are…Inlets A and B fill a tank in 30 and 45 minutes, and outlet C empties it in 36 minutes.…A pipe pours 20 litres per minute into an empty 600-litre tank. After 10 minutes a crack…