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M10 - #8

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M10 - #8 [#permalink] New post 29 Jul 2009, 16:49
To arrive at its destination on time, a bus should have maintained a speed of V kmh throughout its journey. Instead, after going the first third of the distance at V kmh, the bus increased its speed and went the rest of the distance at 1.2V kmh. If, as a result, the bus arrived at its destination X minutes earlier than planned, what was the actual duration of the trip?



(C) 2008 GMAT Club - m10#8

Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient
Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
EACH statement ALONE is sufficient
Statements (1) and (2) TOGETHER are NOT sufficient



Solution is B - but how is S2 sufficient if i still have 2 variables and 2 unknowns in the equation?
can somebody please help? thanks in advance!
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Re: M10 - #8 [#permalink] New post 30 Jul 2009, 16:29
Can you please clarify which is statement 1 and which is statement 2?
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Re: M10 - #8 [#permalink] New post 02 Sep 2009, 22:12
posting the entire problem again.

To arrive at its destination on time the bus should have maintained a speed of V kmh throughout the journey. Instead, after going the first third of the distance at V kmh, the bus increased its speed and went the rest of the distance at (1.2)*V kmh. As a result, the bus arrived at its destination X minutes earlier than planned. What was the actual duration of the trip?

1. V = 60
2. X = 20

viperm5 wrote:
Solution is B - but how is S2 sufficient if i still have 2 variables and 2 unknowns in the equation?
can somebody please help? thanks in advance!


as per the question s/v is what we need to find, i.e the duration of the trip, so it is enough to find s/v , no need to find separately s and v.
Re: M10 - #8   [#permalink] 02 Sep 2009, 22:12
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M10 - #8

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