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A van left a station at exactly 8:45am and

travelled at an average speed of 68km/h. He

stopped at a police barrier for 10 minutes and

travelled a distance of 111km to reach his

destination at exactly 11:57am. If the time he

used from the barrier to his destination is 15

minutes more than the time he used from the

station to the barrier. Find the

(i) time used from the station to the barrier;

(ii) distance between the barrier and the station.

(iii) average speed from the barrier to the

destination.