Question
Luke jogged while Tiffany walked from the same place but in opposite directions along a straight road. After 4 hours, they were 28 km apart. Luke’s average speed was 1.6 km/h faster than Tiffany’s average speed. What was Tiffany’s average walking speed in km/h? Express your answer in decimal.
3 m

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Luke jogged while Tiffany walked from the same place but in opposite directions along a straight road. After 4 hours, they were 28 km apart. Luke’s average speed was 1.6 km/h faster than Tiffany’s average speed. What was Tiffany’s average walking speed in km/h? Express your answer in decimal.