It is currently 24 Feb 2018, 13:33

### 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

# A and B ran, at their respective constant rates, a race of 480 m. In

Author Message
TAGS:

### Hide Tags

Director
Joined: 07 Dec 2014
Posts: 907
Re: A and B ran, at their respective constant rates, a race of 480 m. In [#permalink]

### Show Tags

27 Jan 2016, 15:37
let t=A's time in seconds for each heat, assuming consistent speed of A
B's speed in heat 1=432/t+6 m/s
B's speed in heat 2=336/(t-2} m/s
assuming consistent speed of B, 432/(t+6)=336/(t-2)
t=30 seconds
B's speed=432/36=336/28=12 m/s
Intern
Joined: 08 Jun 2011
Posts: 18
Re: A and B ran, at their respective constant rates, a race of 480 m. In [#permalink]

### Show Tags

08 Jul 2017, 08:29
3
KUDOS
case 1:, B has been given 48m headstart; A won by 6 seconds.
case 2, B is given headstart of 144m; B won by 2 sec

So, B went on from losing to winning & we know this happened for time difference of 8 seconds (from loosing by 6 sec to winning by 2 seconds), This happened because B traveled 144-48 = 96m more in first case.
Now B traveled 96m in 8 sec and hence, speed of B = 96/8 = 12m/s

Ans is A
Intern
Joined: 08 Dec 2017
Posts: 16
Re: A and B ran, at their respective constant rates, a race of 480 m. In [#permalink]

### Show Tags

20 Jan 2018, 04:32
A goes 480m in t seconds. In t seconds B goes 432-6x where x is his rate. In the next race b goes 336 in t-2 seconds. So in two seconds b goes (432-6x)-336=96-6x meters. He would also go 2x meters every two seconds. 96-6x=2x so x =12m/s

Posted from my mobile device
Re: A and B ran, at their respective constant rates, a race of 480 m. In   [#permalink] 20 Jan 2018, 04:32

Go to page   Previous    1   2   [ 23 posts ]

Display posts from previous: Sort by