This is what happens when problem authors take a math perspective instead of a physics one.
I see the same thing with problems dealing with velocity and speed.
At a recent mathematics competition, the following problem was presented:
"If Steve travels three miles due west and then four miles due north, how far has he travelled from his original position?"
The answer given as correct was "five miles". I disagreed strongly and suggested they also take "7 miles" as a correct response.
The intent is clear enough, but the wording is not.
TKHunny, I disagree. If the problem had said "How far has he travelled" then I could see "7 miles" as the correct answer. But the problem specifically says "How far has he travelled from his original position" (emphasis mine). He is now 5 miles from his original position so he has travelled 5 miles from his original postition.
(And I don't see how that has anything to do with "physics" or "math" perspectives.)