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# a's speed is 1.5 times b's speed vs a is 1.5 times faster

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Intern
Joined: 16 Jul 2012
Posts: 12
Location: India
GMAT 1: 690 Q44 V40
GPA: 3.6
WE: Design (Telecommunications)
Followers: 1

Kudos [?]: 35 [1] , given: 24

a's speed is 1.5 times b's speed vs a is 1.5 times faster [#permalink]

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30 Oct 2012, 05:10
1
KUDOS
Hi all

I have a basic question on these 2 questions.
1.A's speed is 1.5 times b's speed.The ratio of their speeds is ? Ans 3:2
2.A is 1.5 times faster than b.Ratio of their speeds is? Ans 5:2

I can understand problem 1,ratio of a/b = 1.5
= 1.5*2/1*2 = 3:2

But how is problem 2 different from problem 1 to give an answer of 5:2?

Thanks
Vandhana
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Cheers
Vandy
My debrief- For people out of touch with exams http://gmatclub.com/forum/my-gmat-story-690-12-27-q-44-v-40-from-390-q-21-v-144885.html
My blog -http://vandyuncensored.blogspot.in/2012/12/my-gmat-story-690-1227-q-44-v-40-from.html

Director
Status: Done with formalities.. and back..
Joined: 15 Sep 2012
Posts: 641
Location: India
Concentration: Strategy, General Management
Schools: Olin - Wash U - Class of 2015
WE: Information Technology (Computer Software)
Followers: 49

Kudos [?]: 589 [1] , given: 23

Re: a's speed is 1.5 times b's speed vs a is 1.5 times faster [#permalink]

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30 Oct 2012, 20:47
1
KUDOS
VandyonWheels wrote:
Hi all

I have a basic question on these 2 questions.
1.A's speed is 1.5 times b's speed.The ratio of their speeds is ? Ans 3:2
2.A is 1.5 times faster than b.Ratio of their speeds is? Ans 5:2

I can understand problem 1,ratio of a/b = 1.5
= 1.5*2/1*2 = 3:2

But how is problem 2 different from problem 1 to give an answer of 5:2?

Thanks
Vandhana

Hi Vandhana,

If you try to write these stems using algebra, you would be able to see the difference clearly.

1. A = 1.5B (A is 1.5 times B)
=> A/B = 1.5 =3/2

2. A-B = 1.5B (A is 1.5 times faster than B)
=> A=2.5B
=> A/B=2.5 =5/2

Hope it helps.
_________________

Lets Kudos!!!
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Intern
Joined: 16 Jul 2012
Posts: 12
Location: India
GMAT 1: 690 Q44 V40
GPA: 3.6
WE: Design (Telecommunications)
Followers: 1

Kudos [?]: 35 [0], given: 24

Re: a's speed is 1.5 times b's speed vs a is 1.5 times faster [#permalink]

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30 Oct 2012, 21:31
Thanks! I understand it now.Kudos to you!
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Cheers
Vandy
My debrief- For people out of touch with exams http://gmatclub.com/forum/my-gmat-story-690-12-27-q-44-v-40-from-390-q-21-v-144885.html
My blog -http://vandyuncensored.blogspot.in/2012/12/my-gmat-story-690-1227-q-44-v-40-from.html

Intern
Joined: 06 Feb 2012
Posts: 1
Followers: 0

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

Re: a's speed is 1.5 times b's speed vs a is 1.5 times faster [#permalink]

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01 Nov 2012, 23:18
Another way you can look at the English in #2 is...

A is 150% faster than B.

B = 1

A = 2.5 (150% faster/ 1.5 times faster.)
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Joined: 09 Sep 2013
Posts: 15400
Followers: 648

Kudos [?]: 204 [0], given: 0

Re: a's speed is 1.5 times b's speed vs a is 1.5 times faster [#permalink]

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03 Feb 2014, 08:24
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
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Re: a's speed is 1.5 times b's speed vs a is 1.5 times faster   [#permalink] 03 Feb 2014, 08:24
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