SOLUTION: On a recent road trip, I drove at a speed of 90 mph for 2 hours. Then I realized my speed was dangerous and slowed down to 70 mph for the remaining 3 hours of my trip. What was my

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Question 1104976: On a recent road trip, I drove at a speed of 90 mph for 2 hours. Then I realized my speed was dangerous and slowed down to 70 mph for the remaining 3 hours of my trip. What was my average speed for this trip?
Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
On a recent road trip, I drove at a speed of 90 mph for 2 hours. Then I realized my speed was dangerous and slowed down to 70 mph for the remaining 3 hours of my trip. What was my average speed for this trip?
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Find the total distance.
Find the total time.
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Avg speed = (total distance)/(total time)

Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
                    SPEED        TIME        DISTANCE

Too Fast              90           2          180

Better Speed          70           3          210

Total                              5          390


Average speed for whole trip, 390%2F5=78, miles per hour