Question
PSLE
A salon is 810 m from Billy’s house. Billy took 20 min to walk from his house to the salon and back again. What was his average walking speed? Give your answer in m/min.
1 m

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PSLE
A salon is 810 m from Billy’s house. Billy took 20 min to walk from his house to the salon and back again. What was his average walking speed? Give your answer in m/min.