CMM: Cutting out cubes from a piece of wood / laying tiles on floor

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Town A and Town B are 70 km apart. A car travels at 8km/hr from Town A to Town B, while a lorry travels at 2km/hr from Town B to Town A.

If both set out at the same time,what is the distance travelled by the car in order to meet the lorry?

Ans: 56 km