Question
A purple bus left Town X for Town Y at the same time when a red bus left Town Y to Town X. The average speed of the purple bus and the red bus were 75 km/h and 89 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 purple bus left Town X for Town Y at the same time when a red bus left Town Y to Town X. The average speed of the purple bus and the red bus were 75 km/h and 89 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?