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TRICKY - Each edge of the above cube has length 1. If an ant

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TRICKY - Each edge of the above cube has length 1. If an ant [#permalink] New post 17 Jun 2018, 07:30
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57% (01:54) correct 42% (00:56) wrong based on 7 sessions
Image
Each edge of the above cube has length 1. If an ant walks from point A to point B along the OUTSIDE of the cube, what is shortest distance the ant must travel?
A) √3
B) 2
C) √5
D) √6
E) √7
[Reveal] Spoiler: OA

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Brent Hanneson – Creator of greenlighttestprep.com
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1 KUDOS received
GRE Instructor
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Joined: 10 Apr 2015
Posts: 1177
Followers: 44

Kudos [?]: 1053 [1] , given: 6

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Re: TRICKY - Each edge of the above cube has length 1. If an ant [#permalink] New post 20 Jun 2018, 05:34
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GreenlightTestPrep wrote:
Image
Each edge of the above cube has length 1. If an ant walks from point A to point B along the OUTSIDE of the cube, what is shortest distance the ant must travel?
A) √3
B) 2
C) √5
D) √6
E) √7


If we open up the cube, we get something like this....
Image

Let x = the distance from A to B
Image
Since we have a right triangle, we can apply the Pythagorean Theorem to get: 1² + 2² = x²
Simplify to get: 1 + 4 = x²
So, 5 = x², which means x = √5

Answer: C

Cheers,
Brent
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Brent Hanneson – Creator of greenlighttestprep.com
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Re: TRICKY - Each edge of the above cube has length 1. If an ant   [#permalink] 20 Jun 2018, 05:34
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TRICKY - Each edge of the above cube has length 1. If an ant

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