SOLUTION: A BOAT GOES 20 KNOTS AT 210 DEGREES AND THE CURRENT GOES 5 KNOTS AT 160 DEGREES. WHAT IS THE ACTUAL SPEED THE BOAT WILL GO? PUT ANSWER TO THE NEAREST TENTH, NO UNITS.

Question 1031935: A BOAT GOES 20 KNOTS AT 210 DEGREES AND THE CURRENT GOES 5 KNOTS AT 160 DEGREES. WHAT IS THE ACTUAL SPEED THE BOAT WILL GO? PUT ANSWER TO THE NEAREST TENTH, NO UNITS.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A BOAT GOES 20 KNOTS AT 210 DEGREES AND THE CURRENT GOES 5 KNOTS AT 160 DEGREES. WHAT IS THE ACTUAL SPEED THE BOAT WILL GO? PUT ANSWER TO THE NEAREST TENTH, NO UNITS.
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Assuming the current is from 340, flowing at 160 degs:
The sides of the triangle are 20 and 5.
The included angle is 130 degs.
Use the Cosine Law to find the 3rd side, the boat's speed wrt the Earth.
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