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Rates: Is the number of seconds required to travel d1 feet,

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by II » Sat Apr 12, 2008 3:13 pm
See attached question ...

Interested in seeing the different approaches to solving this question ...
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Last edited by II on Mon May 05, 2008 1:45 am, edited 1 time in total.
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Source: — Data Sufficiency |
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by Stuart@KaplanGMAT » Sat Apr 12, 2008 6:08 pm
(1) nothing about rates.. insufficient.

(2) nothing about distances.. insufficient.

R1 > R2 and D1 >D2

We want to solve for time, which is D/R - so just knowing that both quantities are bigger won't let us solve for which time is bigger unless we know the ratios of the rates and distances. In other words, if we had a multiplier we could solve, but with addition or subtraction we're going to be able to choose numbers that could make either T1 or T2 bigger.

Choose (e), not enough info.
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by II » Sun Aug 17, 2008 5:30 am
did anyone approach this differently ?
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by sudhir3127 » Sun Aug 17, 2008 5:46 am
i did the same as stuart... i think it shud be E.
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by 4meonly » Sun Aug 17, 2008 5:57 am
1) d1=d2+30 insuff - nothing about rates
2) r1=r2+30 insuff - nothing about distances

1 and 2
(d2+30)/(r2+30) and d2/r2
nothing about ratios - insufficient

the same approach
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