"Ο άντρας τρέχει δέκα χιλιόμετρα την ημέρα."

Translation: The man runs ten kilometers a day.

[ShaoxuanLi]

is per a time unit, such as per day, per week, per month and so on all expressed with accusative/αιτιατική?

[troll1995]

Yes ;)

[ShaoxuanLi]

Thanks and what about other ratio measurements, such as "miles/hour", "liters/100 kilometer" and etc.?

[troll1995]

Miles/hour=Μίλια την ώρα, μίλια ανά ώρα
"Per" in Greek is "ανά", so 1 liter/100 km= ένα λίτρο ανά 100 χιλιόμετρα

[ShaoxuanLi]

and what case comes after ανά; also accusative?

[troll1995]

Yes, yes, sorry for forgetting about that... ;)

[griffpatch]

Hovering over "την" gives you the not "A"

[jaye16]

Ok, it's now ok I think and many thanks.

[jaye16]

Many thanks for the heads up. We'll check that out and rectify it.

[aSf6ryhz]

Dualingo is "confised about this sentence....". "...ten kilometers each day" should have been accepted but was marked wrong... Pls fix.

[jaye16]

It has been added.

[aSf6ryhz]

Actually, it hasnt been fixed and was just marked wrong again....

[jaye16]

"Each day" which was the previous issue was corrected 5 days ago. But here I think we have something else. We accept .... ten kilometers/ten kilometres/10 kilometers/10 kilometres. We don't accept "km" which I think is what you used. I'm contacting Duo to see which abbreviations are automatically accepted...I'll get back to you.

Thanks for bringing it to our attention.