A suspicious vehicle can be tracked along the motorway by noting the time it passes each ANPR monitoring point. If a car passes monitor A at

22.12.06 and monitor B at 22.54.07 and the monitors are 62 km apart calculate the average speed of the vehicle between the two monitoring points. Express your answer in km/hour to 2 decimal places.

Average speed = distance / difference in time

Difference in time
= 22.54.07 - 22.12.06
= (54-12)'-(07-06)"
=42min - 01 sec
= 2521 sec.
Distance = 62 km

Average speed
= 62/(2521/3600) km/hr
= 88.6 km/hr