Question
A red bus left Town P for Town Q at the same time when a purple bus left Town Q to Town P. The average speed of the red bus and the purple bus were 57 km/h and 75 km/h respectively. The two buses passed each other at a point 18 km from the midway of the two towns. How far apart are these two towns?
3 m

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A red bus left Town P for Town Q at the same time when a purple bus left Town Q to Town P. The average speed of the red bus and the purple bus were 57 km/h and 75 km/h respectively. The two buses passed each other at a point 18 km from the midway of the two towns. How far apart are these two towns?