Engineering Board Exam Reviewer · Solutions to Oblique Triangles · medium
Two ships leave port at the same time. One sails on a bearing of N 20° E at 18 knots and the other on a bearing of S 70° E at 24 knots. How far apart, in nautical miles, are they after 3 hours?
- 126
- 90
- 18
- 73.76
Answer
B. 90
Solution
After 3 h the distances are 54 and 72 nautical miles. The bearings are 20° and 110° from north, so the angle between the courses is 90°. Distance =sqrt(542+722)=90.
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