Relative Speeds - gmatclub

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by GMATGuruNY » Fri Mar 25, 2011 6:39 am
HSPA wrote:Kindly ping Mitch Hunt(GMAT guru)... He is a teacher by profession.. I am doubting if my explanation is sufficent.

Mitch can you put down your words and approach for this.
I received a PM asking me to comment.

HSPA's approach is brilliant. Below is a drawing that illustrates how the trains will meet for the first time after 1 hour of travel and for second time after 2 hours of travel.

Image

The distance between the 2 meeting points is 30 miles.

The correct answer is B.
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by force5 » Sat Mar 26, 2011 7:19 am
yes perfect.... thats how i got 30.