Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 04 Jul 2015, 07:00

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In a km race, A gives B a start of 20 seconds and beats him

Author Message
TAGS:
Current Student
Joined: 29 Jan 2005
Posts: 5240
Followers: 23

Kudos [?]: 191 [0], given: 0

In a km race, A gives B a start of 20 seconds and beats him [#permalink]  29 Oct 2005, 09:34
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
In a km race, A gives B a start of 20 seconds and beats him by 40m. However, when he gives B a start of 25 seconds they finish in a dead heat. What is Aâ€™s speed in m/sec?

(1) 12.5 m/sec
(2) 20 m/sec
(3) 8 m/sec
(4) 10 m/sec
(5) 14 m/sec
VP
Joined: 30 Sep 2004
Posts: 1488
Location: Germany
Followers: 4

Kudos [?]: 102 [0], given: 0

4)...

in the first run A beats B by 40m with a headstart of 20s
in the second run A gives B a headstart of 5s more and it ends in a draw. that means B ran the 40m in 5s. so his speed is 8m/s. 1000m/8s/m= 125s-25s=100s. A needs 100s to run 1000m. so its 10m/s.
_________________

If your mind can conceive it and your heart can believe it, have faith that you can achieve it.

Manager
Joined: 14 Apr 2003
Posts: 85
Followers: 1

Kudos [?]: 1 [0], given: 0

Re: PS Race Ascent 5/02 [#permalink]  29 Oct 2005, 09:54
GMATT73 wrote:
In a km race, A gives B a start of 20 seconds and beats him by 40m. However, when he gives B a start of 25 seconds they finish in a dead heat. What is Aâ€™s speed in m/sec?

(1) 12.5 m/sec
(2) 20 m/sec
(3) 8 m/sec
(4) 10 m/sec
(5) 14 m/sec

In case where A gives 20 sec and wins by 40m. Sa = speed of A Sb speed of B.

1000/Sa = (1000- (20 * Sb) -40) /Sb

In case 2 - 1000/Sa = (1000 -25 * Sb)/Sb

Sa is 10 m /sec.
Re: PS Race Ascent 5/02   [#permalink] 29 Oct 2005, 09:54
Similar topics Replies Last post
Similar
Topics:
48 A's speed is 20/13 times that of B. If A and B run a race 19 19 Nov 2011, 02:56
55 Points A and B are 120 km apart. A motorcyclist starts from 30 17 Apr 2010, 08:13
17 In a 100m race, Sam beats John by 4 seconds. On the contrary 9 29 Apr 2009, 00:09
A and B ran a race of 480 m. In the first heat, A gives B a 4 18 Oct 2007, 22:05
P can give Q a start of 20 seconds in a kilometer race 6 25 Aug 2005, 15:36
Display posts from previous: Sort by