A salesman travelled due west from city A to city B. The distance he travelled was X km. He returned from B to A and found that he had travelled half the distance i.e. 1⁄2X. How can that be?
closed as too broad by boboquack, Jamal Senjaya, ABcDexter, Deusovi♦ Sep 15 '17 at 15:22
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
A is two thirds of the way around the globe
to return to B, the shortest path would be to continue the last third -- 1/2X
There are probably
Lots of other tricks with a globe, e.g the salesman is near the north pole, for example.
A and B are the same city. X=0km.
Both City A and City B are on the equator, City B was 28000km west of A, he went back going west as well, which would be 14000km.
He traveled through mountain curvy roads, seasides etc...
and after that
he turned back by plane by (almost) straight line
While he travaled due west to get there, while returning, he
followed the Geodesic.
Although I am not sure if that can make up for 50%.
At least one of the cities could have moved.
This could be easily true with a 'tent city' or cities on different planets. For a space trip 'due west' could be a course tangential to the surface.
He went straight over a mountain the first time, and though it's tunnel on the way back.
The frame of reference for measuring the distances is the Solar System. Taking into account rotation of the Earth and its orbit of the Sun, journey A-B started and concluded at fixed points in the Solar System that were twice the straight-line separation of those of journey B-A; because journey A-B took roughly twice the duration.
City A is on a hill. He traveled a longer route going downhill because going down to steeply is harder/too dangerous, but on the way back he just took the most direct route.
This saleman was
on a boat and had to go against the river to go, and let the water do the job on returning?
He HAD in fact travelled half the distance (1/2X). Then he had travelled half the distance again (12/X), and got back to where he started (After a total distance of X).
You could even read the story as being told out of order, if that makes more sense.