Question
At 12 p.m., a car left City R for City S at an average speed of 80 km/h while a lorry left City S for City R at an average speed of 60 km/h. At 4.15 p.m., the two vehicles were 20 km apart. Find the distance between City R and City S.
3 m

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At 12 p.m., a car left City R for City S at an average speed of 80 km/h while a lorry left City S for City R at an average speed of 60 km/h. At 4.15 p.m., the two vehicles were 20 km apart. Find the distance between City R and City S.