DSSSB · Mathematics
Pipe A can fill a tank in 12 hours and Pipe B can fill it in 15 hours. Pipe C can empty the full tank in 18 hours. All three pipes are opened together. After 4 hours, Pipe B is closed but Pipe A and C continue working. After 6 hours from the beginning, Pipe C is also closed and Pipe A continues working alone. Find the time required for Pipe A to completely fill the remaining part of the tank.
- 6 hours 48 minutes
- 4 hours 15 minutes
- 5 hours 47 minutes
- 3 hours 24 minutes
Pipe A can fill a tank in 12 hours and Pipe B can fill it in 15 hours. Pipe C can empty the full tank in 18 hours. All three pipes are opened together. After 4 hours, Pipe B is closed but Pipe A and C continue working. After 6 hours from the beginning, Pipe C is also closed and Pipe A continues working alone. Find the time required for Pipe A to completely fill the remaining part of the tank.
- 6 hours 48 minutes
- 4 hours 15 minutes
- 5 hours 47 minutes
- 3 hours 24 minutes
Answer and detailed solution are available in the protected study screen.
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