Can you solve the jail break riddle? - Dan Finkel

4,309,109 views ・ 2019-02-26

TED-Ed


μ•„λž˜ μ˜λ¬Έμžλ§‰μ„ λ”λΈ”ν΄λ¦­ν•˜μ‹œλ©΄ μ˜μƒμ΄ μž¬μƒλ©λ‹ˆλ‹€.

λ²ˆμ—­: Jun Young Kim κ²€ν† : Won Jang
00:06
Your timing made you and your partner
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타이밍 덕뢄에 λ‹Ήμ‹ κ³Ό λ‹Ήμ‹ μ˜ νŒŒνŠΈλ„ˆλŠ”
00:08
the most infamous bank robbers in the west.
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μ„œλΆ€μ—μ„œ κ°€μž₯ μ•…λͺ… 높은 은행 강도가 λ˜μ—ˆμŠ΅λ‹ˆλ‹€.
00:11
Now, you’ll need to use that timing to help you break out of jail.
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당신은 이 타이밍을 μ΄μš©ν•΄ νƒˆμ˜₯ν•΄μ•Ό ν•©λ‹ˆλ‹€.
00:15
At the appointed time, you’ll be walking in the yard near the electric fence.
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정해진 μ‹œκ°„μ— 당신은 μ „κΈ° μšΈνƒ€λ¦¬ 주변을 κ±Έμ–΄κ°ˆ κ²ƒμž…λ‹ˆλ‹€.
00:20
Your partner will flash you the signal,
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νŒŒνŠΈλ„ˆκ°€ μ‹ ν˜Έλ₯Ό 보낼 것이고
00:22
and exactly 45 seconds later,
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μ •ν™•νžˆ 45초 후에,
00:25
short out the fence circuit.
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μšΈνƒ€λ¦¬μ˜ νšŒμ„ μ΄ 끊길 κ²ƒμž…λ‹ˆλ‹€.
00:27
It’ll automatically restart after a second or two,
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μž μ‹œ 후에 νšŒλ‘œκ°€ λ‹€μ‹œ μΌœμ§€κ² μ§€λ§Œ
00:30
but as long as you move fast,
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λΉ λ₯΄κ²Œ ν–‰λ™ν•œλ‹€λ©΄
00:32
you’ll be home free.
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당신은 μžμœ κ°€ 될 κ²ƒμž…λ‹ˆλ‹€.
00:34
And then you notice,
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ν•˜ν•„μ΄λ©΄ λ°”λ‘œ κ·Έλ•Œ
00:35
to your horror,
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당신은 λ‹Ήμ‹ μ˜ μ‹œκ³„κ°€
00:36
that your watch is broken,
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κ³ μž₯ λ‚¬λ‹€λŠ” 것을 μ•Œμ•„μ±˜μ§€λ§Œ,
00:38
and there’s no time to fix it.
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κ³ μΉ  μ‹œκ°„μ€ μ—†μŠ΅λ‹ˆλ‹€.
00:40
The signal is coming,
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μ‹ ν˜ΈλŠ” 곧 올 것이고
00:41
and if you make even a small mistake in counting off 45 seconds,
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λ§Œμ•½ 45초λ₯Ό μ •ν™•νžˆ 세지 λͺ»ν•˜λ©΄
00:45
you’ll get fried.
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당신은 감전돼 버릴 κ²ƒμž…λ‹ˆλ‹€.
00:47
Searching your pockets,
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μ£Όλ¨Έλ‹ˆλ₯Ό 뒀지닀가
00:48
you find something that might help:
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당신은 도움이 될 λ§Œν•œ 것을 μ°Ύμ•˜μŠ΅λ‹ˆλ‹€.
00:51
a lighter and two fuses you made earlier in the prison work program.
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라이터와 당신이 λ…Έμ—­ 쀑 λ§Œλ“€μ—ˆλ˜ 두 개의 λ„ν™”μ„ μž…λ‹ˆλ‹€.
00:56
Each fuse is a length of flammable twine,
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각각의 도화선은 λΆˆνƒ€λŠ” 재질의 λ…ΈλˆμœΌλ‘œ λ§Œλ“€μ–΄μ Έ 있으며
00:59
built to be lit on either end and burn for precisely one minute.
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μ–‘μͺ½ λμ—μ„œ λΆˆμ„ 뢙일 수 있고 μ •ν™•νžˆ 1λΆ„ λ™μ•ˆ λΆˆνƒ‘λ‹ˆλ‹€.
01:04
The problem is that even though the fuses look uniform,
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λ¬Έμ œλŠ” 도화선이 균일해 λ³΄μ΄μ§€λ§Œ,
01:07
they don’t burn evenly,
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이듀은 μΌμ •ν•˜κ²Œ 타지 μ•ŠμŠ΅λ‹ˆλ‹€.
01:09
so if you cut one in half, for example,
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예λ₯Ό λ“€μ–΄ λ§Œμ•½ 당신이 ν•˜λ‚˜μ˜ 도화선을 반으둜 자λ₯Έλ‹€λ©΄,
01:11
one side might burn longer than the other.
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ν•œ μͺ½μ΄ λ‹€λ₯Έ μͺ½ 보닀 더 λΉ λ₯΄κ²Œ νƒˆμ§€λ„ λͺ¨λ¦…λ‹ˆλ‹€.
01:15
Your partner is going to give the signal any minute,
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νŒŒνŠΈλ„ˆμ˜ μ‹ ν˜ΈλŠ” 곧 올 것이고
01:17
and you’ll have to make your move.
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당신은 λΉ λ₯΄κ²Œ 선택해야 ν•©λ‹ˆλ‹€.
01:19
How can you use the fuses and lighter to time exactly 45 seconds?
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도화선과 라이터λ₯Ό μ‚¬μš©ν•˜μ—¬ μ–΄λ–»κ²Œ μ •ν™•νžˆ 45초λ₯Ό 잴 수 μžˆμ„κΉŒμš”?
01:24
Pause the video to figure it out yourself.
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λ™μ˜μƒμ„ μž μ‹œ λ©ˆμΆ”κ³  닡을 생각해 λ³΄μ„Έμš”.
01:29
Answer in 3
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3초 λ’€ μ •λ‹΅
01:31
Answer in 2
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2초 λ’€ μ •λ‹΅
01:33
Answer in 1
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1초 λ’€ μ •λ‹΅
01:35
The length of the fuse may not tell you anything,
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λ„ν™”μ„ μ˜ κΈΈμ΄λ‘œλŠ” 아무것도 μ•Œμ•„λ‚Ό 수 μ—†μ§€λ§Œ
01:37
but you do know the fuses take exactly 60 seconds to burn from end to end.
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당신은 각각의 도화선은 λμ—μ„œ λκΉŒμ§€ νƒ€λŠ” 데
μ •ν™•νžˆ 60μ΄ˆκ°€ κ±Έλ¦°λ‹€λŠ” 것을 μ••λ‹ˆλ‹€.
01:43
Here’s the key insight:
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μ •λ‹΅μ˜ νžŒνŠΈλŠ”:
01:44
If you start a fuse on one side and it burns for 30 seconds,
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ν•œ λ„ν™”μ„ μ˜ 끝에 λΆˆμ„ 뢙이고 30μ΄ˆκ°€ μ§€λ‚œλ‹€λ©΄
01:48
there’ll still be 30 seconds of fuse left.
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λ‹€ νƒ€λŠ”λ° 30μ΄ˆκ°€ 더 걸릴 κ²ƒμž…λ‹ˆλ‹€
01:52
If you had started it from the other end,
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λ§Œμ•½ λ°˜λŒ€μͺ½μ—μ„œ μ‹œμž‘ν–ˆλ‹€ 해도
01:54
it would’ve reached the exact same spot in thirty seconds.
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30μ΄ˆκ°€ μ§€λ‚˜λ©΄ μ •ν™•νžˆ 같은 μœ„μΉ˜λ₯Ό 지날 κ²ƒμž…λ‹ˆλ‹€.
01:58
That means that if you lit it from both ends simultaneously,
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그럼 μ–‘μͺ½ 끝에 λ™μ‹œμ— λΆˆμ„ 뢙인닀면
02:01
it would burn out in precisely 30 seconds.
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도화선이 νƒ€λŠ”λ° μ •ν™•νžˆ 30μ΄ˆκ°€ 걸릴 것 μž…λ‹ˆλ‹€.
02:05
But how will you time the last fifteen?
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λ§ˆμ§€λ§‰ 15μ΄ˆλŠ” μ–΄λ–»κ²Œ μž¬μ•Όν• κΉŒμš”?
02:08
That’ll have to come from the second fuse.
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두 번째 도화선을 μ‚¬μš©ν•  μ°¨λ‘€μž…λ‹ˆλ‹€.
02:10
If it were a 30 second fuse,
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λ§Œμ•½ κ·Έ 도화선이 30초짜리 도화선이라면
02:12
you’d be able to use that same trick again
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μ•„κΉŒμ™€ 같은 방법을 μ‚¬μš©ν•˜μ—¬
02:14
to double the burning speed and make it last exactly 15 seconds.
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두 배의 μ†λ„λ‘œ νƒœμ›Œ μ •ν™•νžˆ 15초λ₯Ό 잴 수 μžˆμŠ΅λ‹ˆλ‹€.
02:19
And, you realize, you can shorten the second fuse
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그리고 두 번째 λ„ν™”μ„ μ˜ ν•œμͺ½ 끝을
02:22
by lighting one end of it at the same time as you light the first.
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첫 번째 도화선과 λ™μ‹œμ— λΆˆλΆ™μž„μœΌλ‘œμ¨
02:27
At the moment the first burns out,
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첫 번째 도화선이 λ‹€ 탔을 λ•Œ
02:29
you’ll be left with 30 seconds on the second fuse.
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두 번째 도화선은 30μ΄ˆκ°€ λ‚¨μ•„μžˆμ„ 것 μž…λ‹ˆλ‹€.
02:33
Just when you’ve got this all figured out,
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문제λ₯Ό ν•΄κ²°ν•œ λ°”λ‘œ κ·Έ μˆœκ°„,
02:35
you see the signal from your partner,
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νŒŒνŠΈλ„ˆμ˜ μ‹ ν˜Έκ°€ μ™”κ³ ,
02:37
and spring into action.
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당신은 κ³„νšμ„ μ‹€ν–‰ν–ˆμŠ΅λ‹ˆλ‹€.
02:38
You gather the four ends of the two fuses and light three of them.
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두 λ„ν™”μ„ μ˜ 4개의 끝을 λͺ¨μ•„ 그쀑 3κ°œμ— 끝에 λΆˆμ„ 뢙인 λ’€,
02:43
The moment the first burns out,
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첫 번째 도화선이 λ‹€ 탄 μˆœκ°„,
02:44
you light the other end of the second fuse.
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두 번째 λ„ν™”μ„ μ˜ 남은 끝을 νƒœμ› μŠ΅λ‹ˆλ‹€.
02:47
When it flickers and dies,
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λͺ¨λ“  도화선이 λ‹€ 탔을 λ•Œ,
02:49
you know that exactly 45 seconds have passed,
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μ •ν™•νžˆ 45μ΄ˆκ°€ μ§€λ‚˜μžˆμ—ˆκ³ ,
02:52
and the electric fence is dead.
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μ „κΈ° μšΈνƒ€λ¦¬λŠ” κΊΌμ‘ŒμŠ΅λ‹ˆλ‹€.
02:55
By the time it hiccups back to life,
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μšΈνƒ€λ¦¬κ°€ λ‹€μ‹œ μΌœμ§€κΈ° 전에
02:57
you’re over the fence and home free.
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당신은 νƒˆμ˜₯에 μ„±κ³΅ν–ˆμŠ΅λ‹ˆλ‹€.
이 μ›Ήμ‚¬μ΄νŠΈ 정보

이 μ‚¬μ΄νŠΈλŠ” μ˜μ–΄ ν•™μŠ΅μ— μœ μš©ν•œ YouTube λ™μ˜μƒμ„ μ†Œκ°œν•©λ‹ˆλ‹€. μ „ 세계 졜고의 μ„ μƒλ‹˜λ“€μ΄ κ°€λ₯΄μΉ˜λŠ” μ˜μ–΄ μˆ˜μ—…μ„ 보게 될 κ²ƒμž…λ‹ˆλ‹€. 각 λ™μ˜μƒ νŽ˜μ΄μ§€μ— ν‘œμ‹œλ˜λŠ” μ˜μ–΄ μžλ§‰μ„ 더블 ν΄λ¦­ν•˜λ©΄ κ·Έκ³³μ—μ„œ λ™μ˜μƒμ΄ μž¬μƒλ©λ‹ˆλ‹€. λΉ„λ””μ˜€ μž¬μƒμ— 맞좰 μžλ§‰μ΄ μŠ€ν¬λ‘€λ©λ‹ˆλ‹€. μ˜κ²¬μ΄λ‚˜ μš”μ²­μ΄ μžˆλŠ” 경우 이 문의 양식을 μ‚¬μš©ν•˜μ—¬ λ¬Έμ˜ν•˜μ‹­μ‹œμ˜€.

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