GMAT Prep2?? (Distance)

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dferm: Master | Next Rank: 500 Posts; Posts: 446; Joined: Thu Jul 26, 2007 1:07 pm; Thanked: 6 times

by dferm » Wed May 14, 2008 9:21 am

Please Help...

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Source: Beat The GMAT — Problem Solving | Wed May 14, 2008 9:21 am

aatech: Master | Next Rank: 500 Posts; Posts: 192; Joined: Tue Apr 29, 2008 7:41 am; Thanked: 14 times

by aatech » Wed May 14, 2008 10:02 am

PQR makes a rt traingle where PQ = x and QR = y

So, PR = root[x^2+y^2]

Time to travel Q->R->P = [y/z] + [{root[x^2+y^2]}/z] = [y+[root[x^2+y^2]]]/z Ans C

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