A boy leaves station X on a bearing of 035° to station y which is 21km away. He then travels to another station Z on a bearing of 125°. If Z is directly East of X, what is the distance from X to his present position?
-
A.
3.0km -
B.
12.04km -
C.
17.2km -
D.
34.18km -
E.
36.61km