The question involves working out the transport and earth wander.
TW/hr = E/W GS * Tan(lat) / 60
EW/hr = 15 * Sin(lat)
E/W GS = change of long * Cos(lat) / duration.
Mean lat is 61
GS = (30-10) * 60 * Cos(61) / 1.5 = 388
TW = 388 * Tan(61) / 60 = 11.7
EW = 15 * Sin(61) = 13.1
Total Wander for 1.5hrs = 1.5(11.7+13.1) = 37.2
Travelling E in N hem so 360-37.2 = 322.8
So I don't get quite the same number. But as both involve a 3,2 and an 8 I wonder if there is a typo?