Calculate Total Boat Trip Distance: 70° & 272° Directions

[FrostScYthe]

Homework Statement

A boat leaves the dock and sails in a direction of 70°. Once reaching its destination on the opposite shore, it sails
in a direction of 272° and docks 150 km north of its original starting position. What is the total distance the boat
has traveled?

Homework Equations

Sine Law

The Attempt at a Solution

I don't think I'm getting the right answer because I'm not representing the problem correctly. This is how I'm representing the problem then I just simply use AAS

http://img243.imageshack.us/my.php?image=untitledce7.jpg

 

[cristo]

Your angles are incorrect- they should be measured from north in a clockwise direction. Using this, you should be able to draw the correct diagram, where the final poistion is due north of the starting position.

 

[radou]

I assume the 272° is with respect to the 'horizontal axis'?