SOLUTION: On an automobile trip, Laura Iossi maintained a steady rate for the first two hours. Rush-hour traffic slowed her rate by 25 mph for the last part of the trip. The entire trip, a d

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Question 1002067: On an automobile trip, Laura Iossi maintained a steady rate for the first two hours. Rush-hour traffic slowed her rate by 25 mph for the last part of the trip. The entire trip, a distance of 125 mi, took 2 1/2 hr. What was her rate during the first part of the trip?
Answer by josgarithmetic(39620)   (Show Source): You can put this solution on YOUR website!
                rate           time         distance
part1            r              2            ( )
part2          r-25            ( )           ( )
totals                                  125

Fill the empty cells based on sums or RT=D.
                rate           time                 distance
part1            r              2                    (2r)
part2          r-25                       
totals                                          125

Use the total distance sum to solve for r.
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