Question
Oscar jogged while Risa walked from the same place but in opposite directions along a straight road. After 2 hours, they were 11 km apart. Risa’s average speed was 1.5 km/h slower than Oscar’s average speed. What was Risa’s average walking speed in km/h? Express your answer in decimal.
3 m

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Oscar jogged while Risa walked from the same place but in opposite directions along a straight road. After 2 hours, they were 11 km apart. Risa’s average speed was 1.5 km/h slower than Oscar’s average speed. What was Risa’s average walking speed in km/h? Express your answer in decimal.