you have two sides (speed * time) and the included angle.
So, use the law of cosines.
The eye of a hurricane passes over Grand
Bahama Island. It is moving in a direction
77.2
◦ north of west with a speed of 49.0 km/h.
Exactly 2.92 hours later, the course of the
hurricane shifts due north, and its speed slows
to 22.4 km/h, as shown.
How far from Grand Bahama is the hurricane
4.64 h after it passes over the island?
Answer in units of km
1 answer