Question
Wesley jogged while Gabby walked from the same place but in opposite directions along a straight road. After 3 hours, they were 21 km apart. Gabby’s average speed was 1.5 km/h slower than Wesley’s average speed. What was Gabby’s average walking speed in km/h? Express your answer in decimal.
3 m

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Wesley jogged while Gabby walked from the same place but in opposite directions along a straight road. After 3 hours, they were 21 km apart. Gabby’s average speed was 1.5 km/h slower than Wesley’s average speed. What was Gabby’s average walking speed in km/h? Express your answer in decimal.