|
Author |
Message |
|
TAGS:
|
|
|
Manager
Joined: 01 Sep 2012
Posts: 100
Followers: 1
Kudos [?]:
5
[0], given: 18
|
A car starts 2/5 of a mile behind a bus that is traveling at [#permalink]
 02 Nov 2012, 08:33
Question Stats:
97% (02:30) correct
2% (00:00) wrong based on 37 sessions
A car starts 2/5 of a mile behind a bus that is traveling at 60 miles per hour. If the car catches up to the bus after 2 minutes, how many miles does the car travel in that time? A. 2\frac{1}{10}B. 2\frac{2}{5}C. 2\frac{1}{2}D. 2\frac{7}{8}E. 3 I am not sure how to approach this one.
my intuition says either B or C.
please help.
thank you _________________
If my answer helped, dont forget KUDOS! 
IMPOSSIBLE IS NOTHING
|
|
|
|
|
|
|
GMAT Club team member
Joined: 02 Sep 2009
Posts: 12116
Followers: 1879
Kudos [?]:
10122
[2] , given: 964
|
Re: A car starts 2/5 of a mile behind a bus [#permalink]
02 Nov 2012, 09:01
2
This post received
KUDOS
|
|
|
|
|
|
Director
Joined: 02 Jul 2012
Posts: 790
Location: India
Concentration: Strategy
GMAT 1: 740 Q49 V42
GPA: 3.8
WE: Engineering (Energy and Utilities)
Followers: 19
Kudos [?]:
277
[1] , given: 45
|
Re: A car starts 2/5 of a mile behind a bus [#permalink]
02 Nov 2012, 09:21
1
This post received
KUDOS
My method was : Car is travelling at a speed of 2/5 miles per 2 mins faster than the bus i.e 12 mph faster than the buse = 72 mph So in 2 mins = 72 * 2/60 = 2.4 Answer is B. Kudos Please... If my post helped.
_________________
Kudos Please... If my post helped.
Thanks To The Almighty - My GMAT Debrief
My Own CR Question 1|My Own CR Question 2|My Own DS Question 1|My Own DS Question 2|
My Own PS Question 1
Last edited by MacFauz on 02 Nov 2012, 21:24, edited 1 time in total.
|
|
|
|
|
|
Manager
Joined: 01 Sep 2012
Posts: 100
Followers: 1
Kudos [?]:
5
[0], given: 18
|
Re: A car starts 2/5 of a mile behind a bus [#permalink]
02 Nov 2012, 09:53
Bunuel wrote: roygush wrote: A car starts 2/5 of a mile behind a bus that is traveling at 60 miles per hour. If the car catches up to the bus after 2 minutes, how many miles does the car travel in that time?
A. 2\frac{1}{10}
B. 2\frac{2}{5}
C. 2\frac{1}{2}
D. 2\frac{7}{8}
E. 3
I am not sure how to approach this one.
my intuition says either B or C.
please help.
thank you Car traveled the distance that the bus covered in 1/30 hours (2 minutes) plus 2/5 miles, thus 60*\frac{1}{30}+\frac{2}{5}=2\frac{2}{5} miles. Answer: B. Hope it's clear. P.S. Please indicate OA for PS problems (rule #7 here: rules-for-posting-please-read-this-before-posting-133935.html). Thank you. Kudos and thank you both for your help, it is clear. i knew it was easy... Bunuel, ive been going through your posts. can you please create a post with Word Problems? like tips and tricks for Work/Rate/Ratio/Precents?
_________________
If my answer helped, dont forget KUDOS!
IMPOSSIBLE IS NOTHING
|
|
|
|
|
|
GMAT Club team member
Joined: 02 Sep 2009
Posts: 12116
Followers: 1879
Kudos [?]:
10122
[0], given: 964
|
Re: A car starts 2/5 of a mile behind a bus [#permalink]
02 Nov 2012, 09:57
roygush wrote: Bunuel wrote: roygush wrote: A car starts 2/5 of a mile behind a bus that is traveling at 60 miles per hour. If the car catches up to the bus after 2 minutes, how many miles does the car travel in that time?
A. 2\frac{1}{10}
B. 2\frac{2}{5}
C. 2\frac{1}{2}
D. 2\frac{7}{8}
E. 3
I am not sure how to approach this one.
my intuition says either B or C.
please help.
thank you Car traveled the distance that the bus covered in 1/30 hours (2 minutes) plus 2/5 miles, thus 60*\frac{1}{30}+\frac{2}{5}=2\frac{2}{5} miles. Answer: B. Hope it's clear. P.S. Please indicate OA for PS problems (rule #7 here: rules-for-posting-please-read-this-before-posting-133935.html). Thank you. Kudos and thank you both for your help, it is clear. i knew it was easy... Bunuel, ive been going through your posts. can you please create a post with Word Problems? like tips and tricks for Work/Rate/Ratio/Precents? Check for theory here: gmat-math-book-87417.htmlFor practice: viewforumtags.phpHope it 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
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. NEW!!! ,11 Mixed Questions NEW!!!, 12 Fresh Meat NEW!!!
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. NEW!!!, 11 New DS set. NEW!!!
What are GMAT Club Tests?
25 extra-hard Quant Tests
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
Manager
Joined: 25 Jun 2012
Posts: 63
Followers: 0
Kudos [?]:
3
[0], given: 20
|
Re: A car starts 2/5 of a mile behind a bus [#permalink]
02 Nov 2012, 13:19
MacFauz wrote: My method was :
Car is travelling at a speed of 2/5 miles per 2 mins faster than the bus
i.e 12 mph faster than the buse
= 72 mph
So in 2 mins = 72 * 2/30 = 2.4
Answer is B.
Kudos Please... If my post helped. Please explain your calculations...to say it rightly - formula where did you get 12 mph and 72 mph and why did you divide it into 2/30?
|
|
|
|
|
|
Director
Joined: 02 Jul 2012
Posts: 790
Location: India
Concentration: Strategy
GMAT 1: 740 Q49 V42
GPA: 3.8
WE: Engineering (Energy and Utilities)
Followers: 19
Kudos [?]:
277
[0], given: 45
|
Re: A car starts 2/5 of a mile behind a bus [#permalink]
02 Nov 2012, 21:31
actleader wrote: MacFauz wrote: My method was :
Car is travelling at a speed of 2/5 miles per 2 mins faster than the bus
i.e 12 mph faster than the buse
= 72 mph
So in 2 mins = 72 * 2/30 = 2.4
Answer is B.
Kudos Please... If my post helped. Please explain your calculations...to say it rightly - formula where did you get 12 mph and 72 mph and why did you divide it into 2/30? Thanks for pointing it out. It was a typo.. Was thinkin 2/60(Conversion from minutes to hours since speed is in mph) equals 1/30 and typed in 2/30. I've changed that now. As for the remaining calculations. The car catches up the distance of 2/5 of a mile with the bus in 2 minutes. So the car must be travelling at a speed of 2/5 miles per 2 mins faster than the bus. 2/5 miles per 2 minutes is (2/5)*(60/2) mph. = 12 mph. Since this is the speed that the car is travelling at in excess to the speed of the bus, to get the speed of the car, we have to add this to the speed of the bus. 60 + 12 = 72 Kudos Please... If my post helped.
_________________
Kudos Please... If my post helped.
Thanks To The Almighty - My GMAT Debrief
My Own CR Question 1|My Own CR Question 2|My Own DS Question 1|My Own DS Question 2|
My Own PS Question 1
|
|
|
|
|
|
Manager
Joined: 25 Jun 2012
Posts: 63
Followers: 0
Kudos [?]:
3
[0], given: 20
|
Re: A car starts 2/5 of a mile behind a bus [#permalink]
03 Nov 2012, 07:37
MacFauz wrote: actleader wrote: MacFauz wrote: My method was :
Car is travelling at a speed of 2/5 miles per 2 mins faster than the bus
i.e 12 mph faster than the buse
= 72 mph
So in 2 mins = 72 * 2/30 = 2.4
Answer is B.
Kudos Please... If my post helped. Thanks for pointing it out. It was a typo.. Was thinkin 2/60(Conversion from minutes to hours since speed is in mph) equals 1/30 and typed in 2/30. I've changed that now. As for the remaining calculations. The car catches up the distance of 2/5 of a mile with the bus in 2 minutes. So the car must be travelling at a speed of 2/5 miles per 2 mins faster than the bus. 2/5 miles per 2 minutes is (2/5)*(60/2) mph. = 12 mph. Since this is the speed that the car is travelling at in excess to the speed of the bus, to get the speed of the car, we have to add this to the speed of the bus. 60 + 12 = 72 Kudos Please... If my post helped. Now I see what (2/5)*(60/2) mph. = 12 mph means and where you got it. It is a [2][/5]/[2][/60] that represented the increasing in speed.
|
|
|
|
|
|
Senior Manager
Joined: 23 Oct 2010
Posts: 338
Location: Azerbaijan
Followers: 6
Kudos [?]:
69
[0], given: 67
|
Re: A car starts 2/5 of a mile behind a bus [#permalink]
04 Nov 2012, 05:14
(S-60)*(2/60)=2/5 s=72 m/h 72*(2/60)=2 2/5 miles
_________________
Happy are those who dream dreams and are ready to pay the price to make them come true
|
|
|
|
|
|
Senior Manager
Joined: 13 Aug 2012
Posts: 468
Followers: 13
Kudos [?]:
88
[0], given: 11
|
Re: A car starts 2/5 of a mile behind a bus [#permalink]
14 Nov 2012, 03:50
In order for a car to catch up to the bus, it must travel the gap plus the additional distance travelled by the bus in two minutes.
\frac{60miles}{hour}x\frac{1 hour}{60minutes}x 2minutes=2miles
d=gap + d of bus
d=\frac{2}{5}miles + 2 miles = 2\frac{2}{5}miles
|
|
|
|
|
|
|
Re: A car starts 2/5 of a mile behind a bus
[#permalink]
14 Nov 2012, 03:50
|
|
|
|
|
|
|
|
|
Similar topics |
Author |
Replies |
Last post |
|
Similar
Topics:
|
 |
|
|
Car A is traveling 20 miles behind car B, which is traveling
|
ggarr |
4 |
01 Mar 2007, 22:33 |
|
|
|
|
Car A is 20 miles behind car B, which is traveling in the
|
helpmeongmat |
1 |
19 Aug 2007, 20:08 |
|
|
|
|
Car A is 20 miles behind car B, which is travelling in the
|
alimad |
5 |
07 Nov 2007, 07:00 |
|
|
|
|
Car A is 20 miles behind car B, which is traveling in the
|
jimmyjamesdonkey |
2 |
13 Mar 2008, 15:24 |
 |
7
|
 |
Car A is 20 miles behind car B, which is traveling in the
|
GMATD11 |
12 |
19 Feb 2011, 07:51 |
|
|
|
|
|
|
close
