Question
A brown bus left Town P for Town Q at the same time when a silver bus left Town Q to Town P. The average speed of the brown bus and the silver bus were 61 km/h and 81 km/h respectively. The two buses passed each other at a point 20 km from the midway of the two towns. How far apart are these two towns?
3 m

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A brown bus left Town P for Town Q at the same time when a silver bus left Town Q to Town P. The average speed of the brown bus and the silver bus were 61 km/h and 81 km/h respectively. The two buses passed each other at a point 20 km from the midway of the two towns. How far apart are these two towns?