The distance between the Platform 9 and 3/4 and Hogwarts is of 420 miles.
Explanation:
As it takes 3.5 hours for the Hogwarts Express to go from the Platform 9 and 3/4 to Hogwarts moving at a speed of 120 miles per hour, in order to know the distance between both places we have to do the following crossed multiplication:
1 hour = 120 miles
3.5 hours = X miles
X = (120 x 3.5) / 1
X = 420
As we can see, the distance between the Platform 9 and 3/4 and Hogwarts is of 420 miles.
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