65 miles per hour .. In math, per is a key word that lets you know there is division.
65 miles / 1 hour = Speed
1200 miles / ? hour = 65/1
which is the same as
? hour/1200 miles = 1/65
? hour = 1200/65
18.46 = how long it takes to drive 1200 miles at 65 mph.
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