When will two ships 120 nautical miles apart, and what is B's bearing from A?

[TJTREAT]

Two ships, A and B, leave port at the same time. Ship A travels northwest at 29 knots and ship B travels at 39 knots in a direction 40° west of south. After what time will the ships be 120 nautical miles apart? What will be the bearing of B (the direction of B's position) relative to A at that time?

 

[DaveC426913]

This is homework. Please use the homework template provided.

Also, you must show your attempts at a solution before we can help you.

 

[Bob S]

You are moving on the curved surface of the Earth. For an accurate navigation, you need to use haversines. See

http://en.wikipedia.org/wiki/Haversine_formula

Bob S