YOU SAID:
家から学校まで三十分かかります。
INTO JAPANESE
家から学校まで三十分かかります。
BACK INTO ENGLISH
It takes 30 minutes from home to school.
INTO JAPANESE
家から学校まで30分かかります。
BACK INTO ENGLISH
It takes 30 minutes from home to school.
That didn't even make that much sense in English.