"It takes me an hour to go to school". In this sentence "it" is a fake subject => it plays no role to the translation to VNese. You can say that: "To go to school takes me an hour" = Đi tới trường chiếm/lấy mất 1 giờ (của tôi). The words in bracket support the meaning of this sentence in VNese. => Conclusion: take oneself time = chiếm/lấy mất 1 giờ của tôi. P/s: "kéo dài" precisely means prolong (= extend in some ways). You can check the dictionary for better expression as well.

It takes me an hour to go to university = Tôi mất 1giờ để tới trường đại học. you can just say "1 giờ" and it is shortcut for above sentence. "kéo dài" means extension in english Hope this help.

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How would you say "It takes me an hour to go to university"= tôi mất một giờ dồng hồ để đi đến trường