Question 1160821
If you try to draw this, it could be like upper triangle, 10 degree opposite of a leg lengthed u, bottom triangle 65 degree opposite a leg lengthed b; both these right triangles share a common leg lengthed 40 meters.


{{{system(tan(10)=u/40,tan(65)=b/40)}}}


These two unknowns can be solved for.
The question is asking for b, and for b+u.