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How long did it take Betty to drive nonstop on a trip from [#permalink]

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28 Feb 2011, 12:25

How long did it take Betty to drive nonstop on a trip from her home to Denver,Colorado? 1) If Betty`s average speed for the trip had been 1,5 times as fast, the trip would have taken 2 hours 2) Betty`s average speed for the trip was 50 miles per hour

How long did it take Betty to drive nonstop on a trip from her home to Denver,Colorado? 1) If Betty`s average speed for the trip had been 1,5 times as fast, the trip would have taken 2 hours 2) Betty`s average speed for the trip was 50 miles per hour

IMO A From (1), \(d/s\) -\(d/1.5s\) = \(2\) \(d\) = \(6s\) We know d = t*s Hence \(t\) =\(6\) So, Sufficient from (2) . s= 50 So, Insufficient _________________

Argument : If you love long trips, you love the GMAT. Conclusion : GMAT is long journey.

What does the author assume ? Assumption : A long journey is a long trip.