Ű ( 68 ȸ) : ٸ
2026-05-15 10:17:03 | ȸ : 1822
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 "
--
[] ( )
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<߿ ܾ>
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/[().HƮ ́]
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, 帧, [syn.] ⇨ flow. (üü ) 帧(of);
(┅) ȫ, ( ) , .
• a of water [tears] / 帧[帣 ].
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< >
my religion is very simple.
my religion is kindness.
/ ܼմϴ.
ģԴϴ.
ƼƮ
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[ 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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