Tobias went to a swimming pool for 3 hours. Swimming every 100 meters took him 5 minutes, but every 25 minutes he had to take a 5-minute pause. How many meters did Tobias swim during his visit to the swimming pool?
We need to count the sequences that Tobias made, which consist of 25 minutes of swimming and a 5-minute pause, so one sequence lasts for 25 minutes + 5 minutes = <<25+5=30>>30 minutes/sequence.
Three hours is 3 hours * 60 minutes/hour = 180 minutes, so he is able to make 180 minutes / 30 minutes/sequence = <<180/30=6>>6 sequences.
Therefore Tobias needs to make 6 pauses within these 6 sequences, which will last for 6 pauses * 5 minutes/pause = <<6*5=30>>30 minutes.
During three hours, he is going to swim for 180 minutes - 30 minutes = <<180-30=150>>150 minutes.
Therefore Tobias can make 100 meters for 150 minutes / 5 minutes/100 meters = 3 times.
So he was able to swim 30 times * 100 meters/time = <<30*100=3000>>3000 meters in total.
#### 3000