Question
PSLE
A clinic is 860 m from David’s house. David took 20 min to walk from his house to the clinic and back again. What was his average walking speed? Give your answer in m/min.
1 m

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PSLE
A clinic is 860 m from David’s house. David took 20 min to walk from his house to the clinic and back again. What was his average walking speed? Give your answer in m/min.