John is trapped in a maze. To find his way out, he walks 10 m, makes a 90o right turn, walks 4 m, makes another 90o turn and walks 7 m. What is his displacement from his initial position? ​

The basketball coach tells his team to run sprints back and forth across the court, which is 30 m long. they start at the left end of the court, run back and forth 6 times, then end back at the left end of the court where they began. what distance did they run? what is their displacement?