Question
Sophia and Elizabeth started driving from the same flat but in opposite directions along a straight road. After driving for 3 hours, they were 450 km apart. Sophia's average speed was 70 km/h. What was Elizabeth's average speed?
2 m

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Sophia and Elizabeth started driving from the same flat but in opposite directions along a straight road. After driving for 3 hours, they were 450 km apart. Sophia's average speed was 70 km/h. What was Elizabeth's average speed?