Trên quãng đường,An thấy Bình đi qua mình.1 phút sau,An bị công An bắt,nên quay lại đuổi theo Bình để nhờ Bình xin hộ.Vận tốc đi bộ của An bằng 1 nửa vận tốc xe điện và gấp rưỡi vận tốc của Bình.Hỏi sau bao lâu An gặp Bình?(Kể từ lúc xe điện đỗ lại?)

Các câu hỏi liên quan

1. If he (eat)......................................... all that, he will be ill. 2. She could give us some advice if she (be)............................................ here now. 3. What (happen)........................................... if my parachute does not open? 4. The baby (wake) ....................................... up if you spoke louder. 5. If he had gotten one more mark, he (pass) ....................................... the exam. 6. If she (not get)................................. married young, she wouldn’t have had many children. 7. If I (know) ..............................................the answer, I would tell you. 8. You (not have)............................................. so many accidents if you drove more carefully. 9. If Peter (ask)............................................ me, I’ll help him with all my ability. 10. If she studied harder, she (get)................................................... better grades. 11. If I (be)................................. you, I (tell) ....................................... them the truth. 12. If you (do)..................................... as I told you, you (succeed)....................................... 13. I (not go).......................................... to his house unless you go with me. 14. We could have a drink if it............................................. (not be) so late. 15. Please don’t disturb him if he (be).............................................. busy. 16. If ice (be).................................. heavier than water, it (not float)..........................................