If it takes 3.5 hour for the hogwart express, moving at a speed of 120 mi/hr, to make it from platform 9 and 3/4 hogwart, how far apart are they

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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