37-38 How fast a ship leaving from its starting point

Problem 37
A ship sails east 20 miles and then turns N 30° W. If the ship's speed is 10 mi/hr, find how fast it will be leaving the starting point 6 hr after the start.

Solution 37


Problem 38
Solve Problem 37, if the ship turns N 30° E.

Solution 38



Dear Sir,

Reference to problem no. 37 , Why the time 6 hours deducted by 2 hours..
Thanks .