Why is the title of "How Much Land Does a Man Need?" written in question form?

The title presents us with a question that is answered
during the course of the story and also points us towards the way in which the story
serves as a kind of parable, which is a short, simple story that presents us with some
kind of moral lesson. Of course, the question is very careful to ask how much land a man
needs, as opposed to wants. This is crucial to
the understanding of the story, and is also refered to at the very end of the story in
its final paragraph, which ironically answers this
question:

His
servant picked up the spade and dug a grave long enough for pahom to lie in, and buried
him in it. Six feet from his head to his heels was all he
needed.

The question is thus
answered: a man only needs enough earth to be buried in, which of course ironically
contrasts with the vast stretches of land that the ever-more greedy Pahom desires. This
of course supports the theme of the story, which is that unchecked ambition and greed
destroys people. It was Pahom's desire to secure ever-greater plots of land that
directly lead to his death and made him unable to enjoy the simple pleasures of life
that he had. Having the title expressed as a question thus focuses our attention as
readers on the moral message of the story and also points towards the irony of how this
question is answered.