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Một bể nước Hình hộp chữ nhật như hình vẽ a) Tính thể tích của bể b) Hiện nay bể chứa 8550 lít nước. Hỏi chiều cao mức nước trong bể bằng bn phần trăm chiều cao của bể? c) Có 3 vòi nước chảy vào bể. Vòi thứ nhất mỗi giờ chảy được 810lít nước. Vòi thứ hai mỗi giờ chảy được 830lít nước, vòi thứ ba mỗi giờ chảy được 760lít nước và nếu cho cả ba vòi cùng chảy thì sau bao lâu bể sẽ đầy?( Nếu lúc đầu bể cạn)
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làm hộ em đi IV. Put these sentences into the reported speech. 1. He said to her, “You are my friend.” 2. Johnny said to his mother, “I don’t know how to do this exercise.” 3. “Don’t come back before one o’clock”, advised my brother. 4. “Cook it in butter”, Mrs Brown said to her daughter. 5. The pupils said “Teacher, give us better marks, please.” 6. My friend said, “Are you going to leave tomorrow?” 7. “Have you done your homework?”, said my mother. 8. I asked Bill,” What time did you go to bed last night?” 9. Paul said, “I must go home now.” 10. “There is an accident”, said the policeman. 11. “We are waiting for the school bus”, said the children. 12. “Must you go now?” said Mr Brown. 13. “Are you going to visit your aunt tomorrow?” asked Tom. 14. “Listen to me and don’t make a noise,” said the teacher to his students. 15. “Tin tired of eating fish”, said Mary to Helen. 16. “The sun always rises in the east,” said Peter. 17. “I didn’t steal your fur coat yesterday,” said Samny to Jean. 18. “You must do your homework everyday”, said Miss Lan to us. 19. “Will we read the story?”, Bill asked his teacher. 20. “I don’t know where Alice is,” said Vicky. 21. Mary asked me “Can you tell me why you are so sad?” 22. “Will you please find out when he last wrote to me?” Jane said to her friend. 23. “You must decide what you want to do”, she said to her daughter.

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