@Mohammed: Since I'm not an expert in both English & Arabic, I always prefer that Arabic learners seek other answers, it's better than giving them wrong information:) But I don't know why I feel that "in" doesn't give the meaning of (في) in this sentence, because this way the meaning might be different, as if we're saying: "I'll start eating my food and finish in 10 minutes". The way that sentence was written, I felt that Anton meant to say that he wants to eat after 10 minutes. But I might be totally wrong, and I wish any expert in translation from English to Arabic, would give us & Anton the right answer.