Question
Justin jogged while Sabrina walked from the same place but in opposite directions along a straight road. After 4 hours, they were 22 km apart. Justin’s average speed was 1.5 km/h faster than Sabrina’s average speed. What was Sabrina’s average walking speed in km/h? Express your answer in decimal.
3 m

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Justin jogged while Sabrina walked from the same place but in opposite directions along a straight road. After 4 hours, they were 22 km apart. Justin’s average speed was 1.5 km/h faster than Sabrina’s average speed. What was Sabrina’s average walking speed in km/h? Express your answer in decimal.