Yes, there is something very wrong with your diagram.View attachment 35859 This is my diagram View attachment 35860
The distance from C to A is 3km from my diagram. But I was asked to find the distance from C to A. I am thinking supposed distance from C to A is C to B. Is anything wrong with my diagram?
to your diagram and you should then see what (immediately).Yes, there is something very wrong with your diagram.
Try adding this View attachment 35861 to your diagram and you should then see what (immediately).

C is 3 km north from B, not from A.I can't still see it. What is wrong?
Grrrrrrrrrrr! ?View attachment 35862
I can't still see it. What is wrong?
I can't still see it. What is wrong?
For the avoidance of any doubt...Grrrrrrrrrrr! ?
Imagine yourself (on the paper) at Point A.
Walk East to B then go North (Up!) from B to C.
You don't end up where you put C, do you?
(C should be above B not above A!!!!)