A mountain rescue post O receives a call via a mobile phone from a walker with emergency. The walker says he is by a pipeline and he can also see a radio mast which he believes to be south-west of him. The pipeline is known to run north-south for a long distance through the point with position vector 6i km,relative to O. The radio mast is know to be at the point with position vector 2j km, relative to O.

(a): Use the information supplied by walker to write down his position vector in the form (ai+bj)km.

Question

A mountain rescue post O receives a call via a mobile phone from a walker with emergency. The walker says he is by a pipeline and he can also see a radio mast which he believes to be south-west of him. The pipeline is known to run north-south  for a long distance through the point with position vector 6i km,relative to O. The radio mast is know to be at the point with position vector 2j km, relative to O.

(a): Use the information supplied by walker to write down his position vector in the form (ai+bj)km.