Question
Nick jogged while Nora walked from the same place but in opposite directions along a straight road. After 3 hours, they were 21 km apart. Nora’s average speed was 2.2 km/h slower than Nick’s average speed. What was Nora’s average walking speed in km/h? Express your answer in decimal.
3 m

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Nick jogged while Nora walked from the same place but in opposite directions along a straight road. After 3 hours, they were 21 km apart. Nora’s average speed was 2.2 km/h slower than Nick’s average speed. What was Nora’s average walking speed in km/h? Express your answer in decimal.