They have asked for an average track and, strictly speaking, it should be measured at the mid-point.  

However, this is a relatively short and predominantly North/South track so there will be very little difference between the initial and mean track.  

Having drawn the line from CRN to KER put the protractor over CRN and align it with magnetic North (the 090ºM radial on the chart will help with this alignment).  

Note the track CRN-KER is 205ºM so the track KER-CRN is 025ºM. 

Look at the answers –there is no need to measure the distance because it’s 70 or 71 nm and the bearing is enough to answer the question.