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Ű ( 68 ȸ) : ٸ

LV47 alexҹ

2026-05-15 10:17:03 | ȸ : 1823


Ű ( 68 ȸ) : ٸ

english that cultivates wisdom !

 

[] :

jane and mack are building a bridge over a narrow stream.

ΰ ó dzʴ ٸ ִ.

 

jane can do the job alone in 30 hours.

30ð ȥڼ ִ.

 

mack can do the job in 45 hours.

Ͽ 45ð ɸ.

 

jane worked on the project alone for 5 hours before mack join him.

jane mack ϱ 5ð ȥڼ Ͽ.

 

the two finished the job together.

ԲϿ ƴ.

how long did it take the two to finish the job

that jane had started alone?

ȥڼ ߴ

̼ Բ Ͽ ġµ 󸶳 ɷ?

 

: ) 13ð ) 15 " ) 17 " ) 19 "

--

[] ( )

==

<߿ ܾ>

nar.row /ńr.ou/[^ ́.()ο]

a. (er; est) , [opp.] wide, broad. 

(Ұ) Ƽ ,

[] , , , ɵ鸮.

a man / .

n. ( pl.) , ¥, , ַ().

v. ϴ, ϴ, ϰ ϴ.

 

pro.ject /prə.dʒékt/[(). ́]

v. Ծϴ, ȹϴ, ߻[]ϴ, ϴ, ̹ ִ, ӿ

׸, ϴ.

a new dam / ο ȹ[]ϴ.

 

proj.ect /prɑ́dʒ.ekt/[() ́.Ʈ]

n. (), ȹ, , ȹ .

a home / ǽ.

 

stream /stri:m/[Ʈ()]

n. ó, , [syn.] flow. (üü ) (of);

() ȫ, ( ) , .

a of water [tears] / [].

==

< >

my religion is very simple.

my religion is kindness.

/ ܼմϴ.

ģԴϴ.

޶ ƼƮ

==

[ ؼ]

: ) 15 ð

ؼ :

jane ϼ۵ 30ð ɸٰ

ð 1/30 Ѵ.

׸ ȥڼ 5ð 5/30 Ǵ 1/6 ƴ.

׷ 5/6 ȴ.

 

5/6 jane mack Բ Ͽ ĥ ȴ.

Ĵ ϸ mack 45ð ɷ ĥ ִٰ

1/45 Ϸ翡 mack ִ ȴ.

 

⼭ ϸ,

Ϸ翡 1/30(jane) +1/45(mack) = 5/90 --1/18 ִ.

׷ ̹ jane Ͽ 5/6 ̴.

---> 5/6 1/18 = 15

==

==

 

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