Try this challenging PSLE speed question.

**Tao Nan SA 2 paper 1 question 6**

At 12 noon, a car left Town A for Town B at an average speed of 100 km/h while a bus left Town B for Town A at an average speed of 80 km/h. At 4.30 p.m, the two vehicles were 20 km apart. Find the distance between Town A and Town B.

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