[填空题]
An airplane is headiry,m4bt9 6;rh njcp*mng ql:blkk gtdl0 ,7-cg9due south at a speed of 600$ \mathrm{~km} / \mathrm{h} $. If a wind begins blowing from the southwest at a speed of 100 $\mathrm{~km} / \mathrm{h}$ (average), calculate:
(a) the velocity (magnitude and direction) of the plane relative to the ground, and $^{\circ} $ east of south
(b) how far from its intended position will it be after 10 min if the pilot takes no corrective action.
[Hint: First draw a diagram.]
