I respect time, so I save it

Algebra Level 3

One month ago, I had to go to my home(dehradun), from delhi, which is 6 hours journey. I had my train in the morning at 8:00 hrs, but however I reached at Delhi railway station two hours early I.e. at 6:00 hrs. Now as I respect time I took a train at 6:00 hrs only for my home, that train was a bit faster than the train that I had to take at 8:00 hrs and therefore I reached Dehradun 3 hours earlier than scheduled. Then I called my driver, and asked him to pick me up, he said me, "Sir, I am on schedule and have already left from the home to pick you up."

Now again to save time I started walking towards my house at a constant speed of 6 kmph. I met my driver in the way and we reached at home 1 hour earlier than scheduled. Assuming that the driver drives vehicle at a constant speed "x" . Find the sum of "x" and "d" (distance between Dehradun railway station and my home).

This problem is original.

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