YOU SAID:
how fast the flour will combust.
INTO JAPANESE
小麦粉がどれくらい速く燃えるか。
BACK INTO ENGLISH
How fast does the flour burn?
INTO JAPANESE
小麦粉はどれくらい速く燃えますか?
BACK INTO ENGLISH
How fast does the flour burn?
Okay, I get it, you like Translation Party.