A and S

Expert replies

AIM TO CRACK GMAT: Senior | Next Rank: 100 Posts; Posts: 80; Joined: Sat Sep 15, 2012 1:07 amFollowed by: 1 member; Thanked: 1 times

by AIM TO CRACK GMAT » Wed Nov 06, 2013 11:58 pm

A and S are running a race of 5000 metres. A finishes the race 40 secs before S. If S's speed while running is 25m/sec. what is A's speed

20m/sec
28.75m/sec
31.25m/sec
34.50m/sec

Like this post

Source: Beat The GMAT — Problem Solving | Wed Nov 06, 2013 11:58 pm

GMAT/MBA Expert

[email protected]: Elite Legendary Member; Posts: 10392; Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members; Location: Palo Alto, CA; Thanked: 2867 times; GMAT Score:800

by [email protected] » Thu Nov 07, 2013 12:32 am

Hi Aim,

While this question is NOT written in GMAT "style" it is based on the Distance Formula, which you'll use a couple of times on Test Day.

D = R(T)

S's Formula: 5000 = (25m/sec)(T)
T = 5000/25 = 200 seconds

Since A finishes 40 seconds BEFORE T, then....
A's Formula: 5000 = R(160 seconds)
R = 5000/160 = 125/4 = 31.25m/sec

Final Answer:C

GMAT assassins aren't born, they're made,
Rich

Last edited by [email protected] on Thu Nov 07, 2013 1:06 am, edited 1 time in total.

Contact Rich at [email protected]

Like this post

ganeshrkamath: Master | Next Rank: 500 Posts; Posts: 283; Joined: Sun Jun 23, 2013 11:56 pmFollowed by: 26 members; Location: Bangalore, India; Thanked: 97 times; GMAT Score:750

by ganeshrkamath » Thu Nov 07, 2013 12:55 am

AIM TO CRACK GMAT wrote:A and S are running a race of 5000 metres. A finishes the race 40 secs before S. If S's speed while running is 25m/sec. what is A's speed

20m/sec
28.75m/sec
31.25m/sec
34.50m/sec

Time taken by S to cover 5000 meters at 25m/sec = (distance/speed) = 5000/25 = 200 seconds

Time taken by A to cover 5000 meters = 200 - 40 = 160 seconds

Speed of A = (distance/time) = 5000/160 = 250/8 = 31.25 m

Choose C

Cheers

Every job is a self-portrait of the person who did it. Autograph your work with excellence.

Kelley School of Business (Class of 2016)
GMAT Score: 750 V40 Q51 AWA 5 IR 8
https://www.beatthegmat.com/first-attemp ... tml#688494

Like this post

Patrick_GMATFix: GMAT Instructor; Posts: 1052; Joined: Fri May 21, 2010 1:30 amFollowed by: 98 members; Thanked: 335 times

by Patrick_GMATFix » Sat Nov 09, 2013 4:08 pm

Video Solution

-Patrick

Check out my site: GMATFix.com

To prep my students I use this tool >> (screenshots, video)

Ask me about tutoring.

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

559 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review