Question
Reggie jogged while Diana walked from the same place but in opposite directions along a straight road. After 5 hours, they were 30 km apart. Reggie’s average speed was 1.8 km/h faster than Diana’s average speed. What was Diana’s average walking speed in km/h? Express your answer in decimal.
3 m

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Reggie jogged while Diana walked from the same place but in opposite directions along a straight road. After 5 hours, they were 30 km apart. Reggie’s average speed was 1.8 km/h faster than Diana’s average speed. What was Diana’s average walking speed in km/h? Express your answer in decimal.