Question 11
In the morning, Anh runs once around a lake in stages of exactly 100 m, resting for 30 seconds between consecutive stages. After the last stage, Anh is back at the starting point. In the afternoon, Anh again runs one lap, this time in stages of exactly 150 m, with a 30-second rest between consecutive stages, and finishes at the starting point. The total rest time over both laps is 14 minutes. How long is the path around the lake?
