Question

A ship is sailing due east at 18 knots runs into a 3 knot current moving 40_ East of North. The resultant speed an direction of the ship are:
a) 20.3 knots ; 6 30' N to E _
b) 15.82 knots ; 8 35' N to E _
c) 20.06 knots ; 6 35' N to E _
d) 20.06 knots ; 83 24' N to E _
draw a velocty diagram; use the law of cosines.

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