Summer is Coming! Join the Game of Timers Competition to Win Epic Prizes. Registration is Open. Game starts Mon July 1st.

 It is currently 21 Jul 2019, 20:31

### 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

# A and B are running in opposite direction on a circular track

Author Message
TAGS:

### Hide Tags

Manager
Joined: 28 Jun 2018
Posts: 154
Location: India
Concentration: Finance, Marketing
Schools: CUHK '21 (II)
GMAT 1: 650 Q49 V30
GPA: 4
A and B are running in opposite direction on a circular track  [#permalink]

### Show Tags

20 Jul 2018, 11:56
00:00

Difficulty:

35% (medium)

Question Stats:

73% (01:43) correct 27% (01:53) wrong based on 69 sessions

### HideShow timer Statistics

A and B are running in opposite directions on a circular track with radius of 7 miles. If they kept running continuously at their own uniform speeds till they met for the second time, What will be the sum of their respective speeds (miles/hr)?

1) A and B both starts from same point and cover same distance before first meeting.
2) A can cover entire circular track in 10 min.

_________________
Math Expert
Joined: 02 Aug 2009
Posts: 7763
Re: A and B are running in opposite direction on a circular track  [#permalink]

### Show Tags

20 Jul 2018, 20:40
1
1
1
kshitizbansal92 wrote:
A and B are running in opposite directions on a circular track with radius of 7 miles. If they kept running continuously at their own uniform speeds till they met for the second time, What will be the sum of their respective speeds (miles/hr)?

1) A and B both starts from same point and cover same distance before first meeting.
2) A can cover entire circular track in 10 min.

A and B could have been given car as poor guys ran for almost $$2\pi*r=2*7*22/7=44 miles each$$ that too if the speeds were same

Meeting second time mean they have covered 2 laps within themselves, so covered 88 miles
Sum of speed =88/(time taken)

1) A and B both starts from same point and cover same distance before first meeting.
This means the speeds are same but what is the speed not known

2) A can cover entire circular track in 10 min
Now this guy A is super human, as running 44miles in 10 minutes is just awesome. Speed =44/(10/60)=44*6=264 miles per hour.
But we don't know about B.
Insufficient

Combined..
So B also takes 10 minutes and he is also awesome with a speed of 264 miles per hour
Combined speed = 264*2=528 miles per hour .....

I am sure no good source would come up with such statistics
_________________
Re: A and B are running in opposite direction on a circular track   [#permalink] 20 Jul 2018, 20:40
Display posts from previous: Sort by