1h vòi 1 chảy được là

          1 : 8 = 1/8 ( bể )

1 giờ vòi 2 chảy được là

         1 : 6 = 1/6 ( bể )

1 giờ vòi 3 chảy được là

           1 : 4 = 1/4 ( bể )

1 giờ cả 3 vòi chảy được : 1/8 + 1/6 + 1/4 = 13/24 ( bể )

Vậy sau 1 giờ cả 3 vòi chảy được 13/24 bể

Tui

1. 1. D. singer The "er" in "singer" is pronounced differently from the "ur" sound in the other words.
2. 2. D. above The "o" in "above" is pronounced differently from the other words, which have a short "o" sound.
3. 3. A. mother The "o" in "mother" is pronounced differently from the other words, which have a long "e" sound.
4. 4. B. about The "ou" in "about" is pronounced differently from the other words, which have a short "o" sound.
5. 5. C. person The "er" in "person" is pronounced differently from the other words, which have a long "u" sound.

• 1. burn, hurt, birth, singer: The "ur" sound in these words is pronounced differently. In "singer," the "er" is pronounced more like a long "e".
• 2. love, colour, opinion, above: The "o" sound in "above" is pronounced differently. It's a diphthong (two vowel sounds blended together), while the other words have a short "o" sound.
• 3. mother, badminton, learn, picture: The "o" sound in "mother" is pronounced differently. It's a short "o" sound, while the other words have a long "e" sound.
• 4. hobby, about, collect, player: The "ou" sound in "about" is pronounced differently. It's a diphthong, while the other words have a short "o" sound.
• 5. surfing, future, person, girl: The "er" sound in "person" is pronounced differently. It's more like a long "e", while the other words have a long "u" sound.

1193779

tại vì bạn đc tick 2gp sau những bạn có 2gp trên bảng xếp hạng

cho một vé báo cáo super vip

còn

Còn

Bruh