Question 1162989
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The distances to and from school are the same.  So, since the ratio of the two speeds is 45:30 = 3:2, the ratio of times at the two speeds is 2:3.<br>
So 2/5 of the total 1/2 hour was spent driving to school; that's 1/5 of an hour, or 12 minutes.<br>
That makes the distance to school (1/5 hour)*(45mph) = 9 miles.<br>