Question
A brown bus left Town Y for Town Z at the same time when a white bus left Town Z to Town Y. The average speed of the brown bus and the white bus were 66 km/h and 73 km/h respectively. The two buses passed each other at a point 21 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 Y for Town Z at the same time when a white bus left Town Z to Town Y. The average speed of the brown bus and the white bus were 66 km/h and 73 km/h respectively. The two buses passed each other at a point 21 km from the midway of the two towns. How far apart are these two towns?