Distance covered = Speed × time spent 

Distance covered in 3 hours = × 3 hours

Distance covered in 3 hours = × 3 hours               

Distance covered in 3 hours = 65 miles × 3

                                                      = 195 miles     (Cancel common units)

Distance covered in 3 hours = 195 miles

Check:

Your answer is 195 miles for 3 hours.

Speed =

Speed =   miles per hour

Speed =

             = 65 miles per hour,

which is matching with the value given in the problem.

So, answer is correct.