how long 多長的時間
一般用在完成式問句(較少)，或是花了多少時間
E.g.
How long have you stayed in Taiwan?
I have stayed in Taiwan for ten years.
How long does it take to go to the hospital?
how fast 多快(偏向強調速度)
E.g.
How fast can your car run?
It can run 70 kilometers per hour at least.
how soon 多快(比較強調花的時間少)
E.g.
How soon can you arrive in Japan?
(I can arrive in Japan) About 7 hours.
Answers
Apa kebingunganmu sudah terpecahkan?
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修正：
(I can arrive in Japan) About 7 hours.
↓
(I can arrive there) In about 7 hours.