I've tried to do this question but I don't think I'm getting the right answer. Can anyone please help me? I tried using the cosine law but I'm not sure it that is the correct way to solve this question. The answer I'm getting I think is way off.

Here's the question:Two drivers leave home and travel on straight roads that diverge at 70 degrees. If one driver travels at an average speed of 83.0 km/h and the other travels at an average speed of 95.0 km/h, how far apart will they be after 45 min.

I would really appreciate it anyone could give a suggestion. Thanks very much