The average speed of a pick-up was 20km/h faster than the average speed of a lorry. The pick-up took 45 minutes less than the lorry to cover a distance of 180 km.

- If the speed of the lorry was x km/h:
- Write expressions in terms of x for the time taken by the lorry and the pick-up respectively to cover the distance of 180 km
- Determine the speed of the lorry and that of the pick-up.

- The distance between towns A and B is 240 km. On a certain day the pick-up started from town A at 8.30 a.m. and the lorry started from town B at the same time. Determine the time that the lorry and the pick-up met.