Question: 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? Think carefully first, then make a decision:
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 = 30 minutes / sequence. Three hours is 3 hours * 60 minutes / hour = 180 minutes, so he is able to make 180 minutes / 30 minutes / sequence = 6 sequences. Therefore Tobias needs to make 6 pauses within these 6 sequences, which will last for 6 pauses * 5 minutes / pause = 30 minutes. During three hours, he is going to swim for 180 minutes - 30 minutes = 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 = 3000 meters in total. So the answer is 3000.