Hogwarts Express Problem Solving Set

2. Professor McGonagall was watching this scene from a window in the castle. She noted that Harry's mad dash after the remembrall took only 4 seconds. What was Harry's speed?

Rate = Distance ÷ Time

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Notes:

Solution:

D = rt

r = 70 ÷ 4

r = 17.5

Harry's speed is 17.5 meters per second.