Author 
Message 
TAGS:

Hide Tags

Manager
Joined: 19 Aug 2009
Posts: 78

Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
09 Sep 2009, 13:26
4
This post was BOOKMARKED
Question Stats:
52% (03:34) correct 48% (02:24) wrong based on 33 sessions
HideShow timer Statistics
Two ants start simultaneously from two ant holes towards each other. The first ant covered 8% of the distance between the two ant holes in 3 hours, the second ant covered 7/120 of the distance in 2 hours 30 minutes. Find the speed (feet/h) of the second ant if the first ant traveled 800 feet to the meeting point. (A) 15 feet/h (B) 25 feet/h (C) 45 feet/h (D) 35 feet/h (E) 40 feet/h
Official Answer and Stats are available only to registered users. Register/ Login.



Senior Manager
Joined: 23 Jun 2009
Posts: 357
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago

Re: Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
09 Sep 2009, 23:06
3
This post received KUDOS
speed of ant1=(8/3)/100 of hole per hour speed of ant2=(7/120)/2,5=(7/3)/100 of hole per hour if ant1 goes 800 metres to meeting point then ant2 goes 700 metres. Total distance makes 1500 metres. speed of ant2=(7/3)/100 of hole per hour it makes (7/3)/100 * 1500= 35 metres per hour.
4)35



Director
Joined: 01 Apr 2008
Posts: 872
Name: Ronak Amin
Schools: IIM Lucknow (IPMX)  Class of 2014

Re: Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
10 Sep 2009, 00:49
maliyeci wrote: speed of ant1=(8/3)/100 of hole per hour speed of ant2=(7/120)/2,5=(7/3)/100 of hole per hour if ant1 goes 800 metres to meeting point then ant2 goes 700 metres. Total distance makes 1500 metres. speed of ant2=(7/3)/100 of hole per hour it makes (7/3)/100 * 1500= 35 metres per hour.
4)35 How did you get the statement in Red? s1=8d/300 and s2=7d/300 Now, how did you arrive at 800 and 700 as the distances?



Senior Manager
Joined: 23 Jun 2009
Posts: 357
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago

Re: Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
10 Sep 2009, 00:54
1
This post received KUDOS
Economist wrote: maliyeci wrote: speed of ant1=(8/3)/100 of hole per hour speed of ant2=(7/120)/2,5=(7/3)/100 of hole per hour if ant1 goes 800 metres to meeting point then ant2 goes 700 metres. Total distance makes 1500 metres. speed of ant2=(7/3)/100 of hole per hour it makes (7/3)/100 * 1500= 35 metres per hour.
4)35 How did you get the statement in Red? s1=8d/300 and s2=7d/300 Now, how did you arrive at 800 and 700 as the distances? speed of ant1 = 8/300 of hole per hour speed of ant2 = 7/300 of hour per hour speed of ant1/speed of ant2=8/7 so in the time ant1 goes 800 metres, ant2 can go 700 metres



Senior Manager
Joined: 23 Jun 2009
Posts: 357
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago

Re: Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
10 Sep 2009, 01:22
Speed of ant1=> ant1 covers 8% of hole in 3 hours = 8/100/3=8/300 speed of ant2=> ant2 covers 7/120 in 2,5 hours = 7/120/2,5=7/300



Director
Joined: 01 Apr 2008
Posts: 872
Name: Ronak Amin
Schools: IIM Lucknow (IPMX)  Class of 2014

Re: Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
10 Sep 2009, 01:30
maliyeci wrote: Economist wrote: maliyeci wrote: speed of ant1=(8/3)/100 of hole per hour speed of ant2=(7/120)/2,5=(7/3)/100 of hole per hour if ant1 goes 800 metres to meeting point then ant2 goes 700 metres. Total distance makes 1500 metres. speed of ant2=(7/3)/100 of hole per hour it makes (7/3)/100 * 1500= 35 metres per hour.
4)35 How did you get the statement in Red? s1=8d/300 and s2=7d/300 Now, how did you arrive at 800 and 700 as the distances? speed of ant1 = 8/300 of hole per hour speed of ant2 = 7/300 of hour per hour speed of ant1/speed of ant2=8/7 so in the time ant1 goes 800 metres, ant2 can go 700 metres ahh i got it... so if we know speeds ( or ratio of speeds ) we can find ratio of distances keeping time as constant. s1/s2 = d1/d2 ( where t1=t2), hence, d1/d2 = 8/7...now d1 = 800, so d2 = 800*7/8 = 700. Nice concept! teşekkür ederim



Senior Manager
Joined: 23 Jun 2009
Posts: 357
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago

Re: Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
10 Sep 2009, 01:49
Economist wrote: teşekkür ederim Where did you learn our thanking words "Teşekkür ederim". I am very happy to see it. Have a nice day.



Manager
Joined: 28 Jul 2009
Posts: 122
Location: India
Schools: NUS, NTU, SMU, AGSM, Melbourne School of Business

Re: Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
10 Sep 2009, 02:10
maliyeci wrote: speed of ant1=(8/3)/100 of hole per hour speed of ant2=(7/120)/2,5=(7/3)/100 of hole per hour if ant1 goes 800 metres to meeting point then ant2 goes 700 metres. Total distance makes 1500 metres. speed of ant2=(7/3)/100 of hole per hour it makes (7/3)/100 * 1500= 35 metres per hour.
4)35 You are too good at this. Great going.
_________________
GMAT offended me. Now, its my turn! Will do anything for Kudos! Please feel free to give one.



Manager
Joined: 27 Oct 2008
Posts: 183

Re: Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
10 Sep 2009, 06:01
speed of ant1 is 8/300 speed of ant2 is 7/300 so if ant1 covers 800 ant 2 will cover 700......speed of ant2 (7/3)/100 per hour hence (7/3)/100 * 1500= 35 metres per hour



GMAT Forum Moderator
Joined: 27 May 2014
Posts: 423

Two ants start simultaneously from two ant holes towards each other [#permalink]
Show Tags
27 Feb 2017, 02:44
Two ants start simultaneously from two ant holes towards each other. The first ant covered 8% of the distance between the two ant holes in 3 hours, the second ant covered 7/120 of the distance in 2 hours 30 minutes. Find the speed (feet/h) of the second ant if the first ant traveled 800 feet to the meeting point. (A) 15 feet/h (B) 25 feet/h (C) 45 feet/h (D) 35 feet/h (E) 40 feet/h
Last edited by saswata4s on 01 Mar 2017, 22:30, edited 1 time in total.



Magoosh GMAT Instructor
Joined: 28 Dec 2011
Posts: 4680

Re: Two ants start simultaneously from two ant holes towards each other [#permalink]
Show Tags
27 Feb 2017, 16:31
saswata4s wrote: Two ants start simultaneously from two ant holes towards each other. The first ant covered 8% of the distance between the two ant holes in 3 hours, the second ant covered ____ of the distance in 2 hours 30 minutes. Find the speed (feet/h) of the second ant if the first ant traveled 800 feet to the meeting point. (A) 15 feet/h (B) 25 feet/h (C) 45 feet/h (D) 35 feet/h (E) 40 feet/h Dear saswata4s, My friend, with all due respect, I believe something is missing from the test of the problems above. It's possible that if there were a math image, say, a fraction, and you copied and pasted, the math symbol did not paste into the plaintext of the GMAT Club problem box. You could retype what is missing in text, or use the math symbolism features. Actually, I found this question already posted here: https://gmatclub.com/forum/timespeedd ... 83745.htmlAlways search before you start a new thread for a question. Bunuel will have to merge the topics. Does all this make sense? Mike
_________________
Mike McGarry Magoosh Test Prep
Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)



GMAT Forum Moderator
Joined: 27 May 2014
Posts: 423

Re: Two ants start simultaneously from two ant holes towards each other [#permalink]
Show Tags
01 Mar 2017, 22:32
Thanks mikemcgarry for pointing out. sorry for the inconvenience caused.
Cheers.



Math Expert
Joined: 02 Sep 2009
Posts: 43810

Re: Two ants start simultaneously from two ant holes towards each other. [#permalink]
Show Tags
01 Mar 2017, 22:41
mikemcgarry wrote: saswata4s wrote: Two ants start simultaneously from two ant holes towards each other. The first ant covered 8% of the distance between the two ant holes in 3 hours, the second ant covered ____ of the distance in 2 hours 30 minutes. Find the speed (feet/h) of the second ant if the first ant traveled 800 feet to the meeting point. (A) 15 feet/h (B) 25 feet/h (C) 45 feet/h (D) 35 feet/h (E) 40 feet/h Dear saswata4s, My friend, with all due respect, I believe something is missing from the test of the problems above. It's possible that if there were a math image, say, a fraction, and you copied and pasted, the math symbol did not paste into the plaintext of the GMAT Club problem box. You could retype what is missing in text, or use the math symbolism features. Actually, I found this question already posted here: https://gmatclub.com/forum/timespeedd ... 83745.htmlAlways search before you start a new thread for a question. Bunuel will have to merge the topics. Does all this make sense? Mike Topics merged. Thank you Mike.
_________________
New to the Math Forum? Please read this: Ultimate GMAT Quantitative Megathread  All You Need for Quant  PLEASE READ AND FOLLOW: 12 Rules for Posting!!! Resources: GMAT Math Book  Triangles  Polygons  Coordinate Geometry  Factorials  Circles  Number Theory  Remainders; 8. Overlapping Sets  PDF of Math Book; 10. Remainders  GMAT Prep Software Analysis  SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS)  Tricky questions from previous years.
Collection of Questions: PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.
What are GMAT Club Tests? Extrahard Quant Tests with Brilliant Analytics




Re: Two ants start simultaneously from two ant holes towards each other.
[#permalink]
01 Mar 2017, 22:41






