Answer: So, his cruising speed s = 50 feet per second .
Step-by-step explanation:
Since we have given that
Total distance covered by a personal watercraft towards a dock = 3050 feet
Time taken to travel = 55 seconds
According to question, he began to slow down 300 feet from the dock , so, at this speed he traveled
Speed will be
So, his cruising speed 's' = 50 feet per second .