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On a trolley ride around an amusement park, a child traveler

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On a trolley ride around an amusement park, a child traveler [#permalink] New post 14 Oct 2013, 07:47
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On a trolley ride around an amusement park, a child travelled from one signpost to a second signpost at a constant speed of 125 meters per minute. Was the distance that the child travelled from the first signpost to the second signpost greater than 0.8km? (1km = 1,000meters)

1) It took less than 450 seconds for the child to travel from the first signpost to the second signpost

2) It took more than 400 seconds for the child to travel from the first signpost to the second signpost
[Reveal] Spoiler: OA
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Re: On a trolley ride around an amusement park, a child traveler [#permalink] New post 14 Oct 2013, 08:01
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On a trolley ride around an amusement park, a child travelled from one signpost to a second signpost at a constant speed of 125 meters per minute. Was the distance that the child travelled from the first signpost to the second signpost greater than 0.8km? (1km = 1,000meters)

(distance) = (time)*(rate)
800 = (time)*125
(time) = 800/125 = 6.4 minutes = 384 seconds.

So, the question basically asks whether the time taken was greater than 384 seconds.

1) It took less than 450 seconds for the child to travel from the first signpost to the second signpost. Not sufficient.

2) It took more than 400 seconds for the child to travel from the first signpost to the second signpost. Sufficient.

Answer: B.
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Re: On a trolley ride around an amusement park, a child traveler [#permalink] New post 14 Oct 2013, 08:02
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Bunuel wrote:
On a trolley ride around an amusement park, a child travelled from one signpost to a second signpost at a constant speed of 125 meters per minute. Was the distance that the child travelled from the first signpost to the second signpost greater than 0.8km? (1km = 1,000meters)

(distance) = (time)*(rate)
800 = (time)*125
(time) = 800/125 = 6.4 minutes = 384 seconds.

So, the question basically asks whether the time taken was greater than 384 seconds.

1) It took less than 450 seconds for the child to travel from the first signpost to the second signpost. Not sufficient.

2) It took more than 400 seconds for the child to travel from the first signpost to the second signpost. Sufficient.

Answer: B.


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Hope this helps.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

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Re: On a trolley ride around an amusement park, a child traveler [#permalink] New post 14 Oct 2013, 08:03
bulletpoint wrote:
On a trolley ride around an amusement park, a child travelled from one signpost to a second signpost at a constant speed of 125 meters per minute. Was the distance that the child travelled from the first signpost to the second signpost greater than 0.8km? (1km = 1,000meters)

1) It took less than 450 seconds for the child to travel from the first signpost to the second signpost

2) It took more than 400 seconds for the child to travel from the first signpost to the second signpost



Statement A: We are not sure, Whether how much it takes for the travel- It may take 100 sec, 200 sec or even 300 sec- So Statement A is not sufficient.

Statement B: 800 meter(0.8 KM) takes less than 400. so we can say that this definitely did not take more than 400 sec- The answer to this statement is NO- Which is sufficient-

Answer is B.
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Re: On a trolley ride around an amusement park, a child traveler   [#permalink] 14 Oct 2013, 08:03
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