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A speed of y yards per minute is equivalent to which of the

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A speed of y yards per minute is equivalent to which of the [#permalink] New post 05 Dec 2007, 18:35
A speed of y yards per minute is equivalent to which of the following speed in inches per second? (1 yard = 3 feet)

A. 5Y/3
B. 12Y
C. 3Y/5
D. Y/20
E. 15Y

I did it a very long way for reasons I don't know. lol Any shortcuts?
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Re: Equivalent [#permalink] New post 05 Dec 2007, 18:46
goodglory wrote:
A speed of y yards per minute is equivalent to which of the following speed in inches per second? (1 yard = 3 feet)

A. 5Y/3
B. 12Y
C. 3Y/5
D. Y/20
E. 15Y

I did it a very long way for reasons I don't know. lol Any shortcuts?


1 ft = 12 inch
3 ft = 12x3 = 36 inches
1 yard = 36 inches
y yard = 36y inches

speed per minuet = 36y inches
speed per second = 36y inches/60 = 3y/5
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 [#permalink] New post 05 Dec 2007, 20:24
C as well. Best way to solve these (unless someone points out a better way) is by creating a formula and picking smart numbers. Then, with your numbers find the answer choice that yields the same answer.

Himalayan's choice of numbers can't be beaten.
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 [#permalink] New post 11 Dec 2007, 00:00
asdert wrote:
C as well. Best way to solve these (unless someone points out a better way) is by creating a formula and picking smart numbers. Then, with your numbers find the answer choice that yields the same answer.

Himalayan's choice of numbers can't be beaten.


Laxieq, Fig, hong, walker are my grand^2 gurus.
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 [#permalink] New post 11 Dec 2007, 01:49
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Himalayan wrote:
Laxieq, Fig, hong, walker are my grand^2 gurus.


:-D You are also very good in quant!

I solved it in the same way with slightly different view:

y [yars/minutes]=y [3 feet / 60 seconds] = y [3 * 12 inches / 60 seconds] =

=y [3 inches/ 5 seconds] =3y/5 [inches/seconds]
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 [#permalink] New post 11 Dec 2007, 02:02
walker wrote:
Himalayan wrote:
Laxieq, Fig, hong, walker are my grand^2 gurus.


:-D You are also very good in quant!



Agree, he is very good, indeed. :)

Thanks for the words (and it's soon the time for me to take a "retreat" at GMATClub Math forum) :)
  [#permalink] 11 Dec 2007, 02:02
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A speed of y yards per minute is equivalent to which of the

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