Question
A green bus left Town M for Town N at the same time when a purple bus left Town N to Town M. The average speed of the green bus and the purple bus were 68 km/h and 73 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 green bus left Town M for Town N at the same time when a purple bus left Town N to Town M. The average speed of the green bus and the purple bus were 68 km/h and 73 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?