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The Lewiston Road Race is how many kilometers long?

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VP
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D
Status: It's near - I can see.
Joined: 13 Apr 2013
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Location: India
Concentration: International Business, Operations
GMAT 1: 480 Q38 V22
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The Lewiston Road Race is how many kilometers long?  [#permalink]

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New post 02 Apr 2018, 10:04
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

83% (00:39) correct 17% (00:47) wrong based on 41 sessions

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The Lewiston Road Race is how many kilometers long?

(1) It takes 2 more hours to complete the race at an average speed of 40 kilometers per hour than at an average speed of 50 kilometers per hour.

(2) At an average speed of 20 kilometers per hour, it took Brett 10 hours to complete half the race.

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Re: The Lewiston Road Race is how many kilometers long?  [#permalink]

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New post 02 Apr 2018, 10:24
1
QZ wrote:
The Lewiston Road Race is how many kilometers long?

(1) It takes 2 more hours to complete the race at an average speed of 40 kilometers per hour than at an average speed of 50 kilometers per hour.

(2) At an average speed of 20 kilometers per hour, it took Brett 10 hours to complete half the race.


From 1: for average speed of 50 kilometers per hour time =t
for average speed of 40 kilometers per hour time =t+2
50*t=40*(t+2)
From here we will get t and multiply with 50 to get distance.
No need to solve till last.

Sufficient
From 2: 10*20=d/2
hence sufficient.

So option D.
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Re: The Lewiston Road Race is how many kilometers long?  [#permalink]

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New post 29 Jul 2018, 00:35
AkshdeepS wrote:
The Lewiston Road Race is how many kilometers long?

(1) It takes 2 more hours to complete the race at an average speed of 40 kilometers per hour than at an average speed of 50 kilometers per hour.

(2) At an average speed of 20 kilometers per hour, it took Brett 10 hours to complete half the race.


Again this seems like a flawed question

according to option A , total distance = 400 KM
According to option B , total distance =200 KM

Although the answer is D, both the statements should give the same value for distance.

Hope this helps.
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Re: The Lewiston Road Race is how many kilometers long? &nbs [#permalink] 29 Jul 2018, 00:35
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