Question
Sam jogged while Sarah walked from the same place but in opposite directions along a straight road. After 2 hours, they were 15 km apart. Sarah’s average speed was 1.8 km/h slower than Sam’s average speed. What was Sarah’s average walking speed in km/h? Express your answer in decimal.
3 m

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Sam jogged while Sarah walked from the same place but in opposite directions along a straight road. After 2 hours, they were 15 km apart. Sarah’s average speed was 1.8 km/h slower than Sam’s average speed. What was Sarah’s average walking speed in km/h? Express your answer in decimal.