- A12 minutes
- B25 minutes
- C22 1/2 minutes
- D20 minutes
Step-by-Step Solution
5 min together: . Left with A at : 17.5 min. Total 22.5 min.
Answer: C) 22 1/2 minutes
Pipe A fills a tank in 30 minutes; pipe B fills it in 20 minutes. Both are opened, and B is turned off after 5 minutes. How many minutes in all does the tank take to fill?
Class 8Pipes and CisternsDirect and Inverse Proportions
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Pipes and Cisterns practice questions
More Class 8 Pipes and Cisterns practice
A pipe can fill a pool in 15 hours. Two pipes, each half as fast, are added. How long do…Pipes A, B and C fill a tank in 3, 4 and 6 hours. A and B are opened together; after 1…Pipe A fills a tank in 12 minutes; pipe B empties it in 24 minutes. Both are opened on…Meena's overhead tank is empty. She opens inlet tap A and, by mistake, the outlet pipe C…The tank in the picture is already half full. Inlet A and outlet C are now both opened.…