Question
At 7.10 a.m., a car left Town B for Town C at an average speed of 90 km/h, while a truck left Town C for Town B at an average speed of 80 km/h. At 1.10 p.m., the two vehicles were 21 km apart. How far apart were the two towns?
3 m

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At 7.10 a.m., a car left Town B for Town C at an average speed of 90 km/h, while a truck left Town C for Town B at an average speed of 80 km/h. At 1.10 p.m., the two vehicles were 21 km apart. How far apart were the two towns?