CUET Preparation Today
A cistern can be filled by an inlet pipe in 40 hours and can be emptied by an outlet pipe in 50 hours. Both the pipes are opened. After 20 hours, the outlet pipe is closed. The total time taken to fill the cistern is: |
40 hours 50 hours 56 hours 46 hours |
56 hours |
The correct answer is Option (3) → 56 hours |
