GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 19 Apr 2019, 23:30

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

In a 200 meters race, A beats B by 20 meters, while in a 100 meters ra

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

 
Manager
Manager
avatar
G
Joined: 10 Oct 2018
Posts: 171
Location: United States
GPA: 4
WE: Human Resources (Human Resources)
In a 200 meters race, A beats B by 20 meters, while in a 100 meters ra  [#permalink]

Show Tags

New post 11 Apr 2019, 05:12
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

43% (03:40) correct 57% (01:53) wrong based on 14 sessions

HideShow timer Statistics

In a 200 meters race, A beats B by 20 meters, while in a 100 meters race, B beats C by 5 meters. A beats C in a kilometer race by
(A) 105 meters
(B) 145 meters
(C) 155 meters
(D) 205 meters
(E) 255 meters

_________________
Kudos OK Please!!
Manager
Manager
User avatar
S
Joined: 13 Feb 2018
Posts: 203
GMAT 1: 640 Q48 V28
Premium Member
In a 200 meters race, A beats B by 20 meters, while in a 100 meters ra  [#permalink]

Show Tags

New post 11 Apr 2019, 06:25
nm97 wrote:
In a 200 meters race, A beats B by 20 meters, while in a 100 meters race, B beats C by 5 meters. A beats C in a kilometer race by
(A) 105 meters
(B) 145 meters
(C) 155 meters
(D) 205 meters
(E) 255 meters


200-meter race
Let's assume that the speed of A=100 m/h
He will finish 200m distance in 2 hours

As B covers 20m less, then in 2 hours he covers 180m, so his speed is \(\frac{180}{2}\)=90m/h

100-meter race
With 90m/h speed, B covers 100m in \(\frac{10}{9}\) hours
So, C will cover 95m in \(\frac{10}{9}\) hours with the speed of 95*\(\frac{10}{9}\)=85.5m/h

1000m=1km race
A covers 1000m with the speed of 100m/h in 10 hours
In 10 hours C, with the speed of 85.5m/h, will cover 855m

So A will beat C in 1000-855=145 meters

IMO
Ans: B
CEO
CEO
User avatar
D
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2906
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Reviews Badge
In a 200 meters race, A beats B by 20 meters, while in a 100 meters ra  [#permalink]

Show Tags

New post 11 Apr 2019, 06:44
2
nm97 wrote:
In a 200 meters race, A beats B by 20 meters, while in a 100 meters race, B beats C by 5 meters. A beats C in a kilometer race by
(A) 105 meters
(B) 145 meters
(C) 155 meters
(D) 205 meters
(E) 255 meters


It can be done as Ratio question

--A-------B-------C
200-----180
--------100------95

Combining the ratios we get

--A-------B --------C
1000-----900------ 855

i.e. when A runs 1000 meters then C runs 855 meters

1 km = 1000 meters

i.e. when A runs 1000 meters then C runs 855 meters

i.e. A beats C by = 1000-855 = 145 meters

Answer: Option B
_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
GMAT Club Bot
In a 200 meters race, A beats B by 20 meters, while in a 100 meters ra   [#permalink] 11 Apr 2019, 06:44
Display posts from previous: Sort by

In a 200 meters race, A beats B by 20 meters, while in a 100 meters ra

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.