Question 1144517
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The algebraic solution from the other tutor is fine, and it is a good example of how basic algebra can be used to solve problems like this.<br>
If an algebraic solution is not required, logical analysis can solve the problem easily.  And the logical reasoning is good exercise for your brain....<br>
The prince traveled for 9 hours at 3mph; the distance he traveled was 9*3 = 27 miles.<br>
The total distance to be traveled was 63 miles; so the distance the princess traveled was 63-27 = 36 miles.<br>
Since the princess started 3 hours after the prince, she traveled for 6 hours.<br>
Since she traveled 36 miles in 6 hours, her speed was 36/6 = 6mph.