Der Flughafen ist zwanzig Kilometer entfernt.

Questions & Answers about Der Flughafen ist zwanzig Kilometer entfernt.

Why doesn't Kilometer have a plural ending here since there are twenty of them?
In German, masculine and neuter units of measurement (like Kilometer, Liter, or Kilo) do not take a plural ending when they come directly after a number. Since der Kilometer is masculine, its form remains identical to the singular when expressing a quantity.
What case is the phrase zwanzig Kilometer in?
It is in the accusative case. German uses the accusative without a preposition to express definite measurements like distance, weight, or duration. Because Kilometer doesn't change its form here, it looks exactly like the nominative, but it is grammatically accusative.
How could I expand this sentence using one of the spatial genitive prepositions from this lesson, like abseits?
You can use the measurement to specify how far away something is relative to a boundary. For example, to say the airport is twenty kilometers away from the main road, you would drop entfernt and say Der Flughafen ist zwanzig Kilometer abseits der Hauptstraße. The measurement phrase goes right before the spatial preposition.
Could I use the word weg instead of entfernt?
Yes, in everyday spoken German, you will frequently hear Der Flughafen ist zwanzig Kilometer weg. Using entfernt is slightly more formal and is the standard written way to express that something is a certain distance away.

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