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Re: x meters vs y kilometers [#permalink]
03 Feb 2012, 07:32

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This post received KUDOS

Expert's post

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This post was BOOKMARKED

If the speed of X meters per second is equivalent to the speed of Y kilometers per hour, what is Y in terms of X? (1 kilometer=1000 meters)

A. 15x/18 B. 6x/5 C. 18x/5 D. 60x E. 3600000x

X meters per second --> --> 3,600X meters per hour (as there are 3,600 seconds in one hour); --> 3,600X/1,000=18X/5 kilometers per hour (as there are 1,000 meters in one kilometer).

Answer: C.

OR: if you are not comfortable with above manipulations with variable X then you can assume x to be equal to some #: let x=10.

Speed = 10 meters per second --> --> 10*3,600=36,000 meters per hour --> --> 36,000/1000=36 kilometers per hour.

So, if x=10, then y=36. Plug x=10 into the answer choices, the one which give 36 will be the correct answer: A. 15x/18=150/18<36; B. 6x/5=60/5=12; C. 18x/5=36 correct choice; D. 60x=600; E. 3,600,000x=36,000,000.

Re: If the speed of X meters per second is equivalent to the [#permalink]
03 Feb 2012, 09:13

thanks alot. I am more comfortable working with the second approach, I needed someone to do it with plugging in approach. Thanks alot _________________

Re: If the speed of X meters per second is equivalent to the [#permalink]
16 Nov 2012, 02:36

This is a sub-600 question. _________________

I've failed over and over and over again in my life and that is why I succeed--Michael Jordan Kudos drives a person to better himself every single time. So Pls give it generously Wont give up till i hit a 700+

Re: If the speed of X meters per second is equivalent to the [#permalink]
02 Sep 2014, 20:27

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Re: If the speed of X meters per second is equivalent to the [#permalink]
09 Sep 2015, 02:12

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).

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