Question 1091636

Hi
two cars leave from the same starting point. One in a direction due west, the second in a direction
with a bearing of South 15 degrees West. After travelling 15km the second car is due south of the first. How far has the first car traveled. 

Thanks
<pre>{{{highlight_green(matrix(1,5, "14.48888739,", or, about, 14.5, km))}}}