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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## Train A leaves the station at 5:00, and travels north at 50 tagged by: M7MBA ##### This topic has 1 expert reply and 0 member replies ## Train A leaves the station at 5:00, and travels north at 50 ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult Train A leaves the station at 5:00, and travels north at 50 miles per hour. If train B leaves the same station some time later, heading in the same direction as train A, at what time will train B overtake train A? (1) Train B leaves the station at 6:00. (2) Train A travels at 5/6 the speed of train B. OA=C Source: Princeton Review ### GMAT/MBA Expert GMAT Instructor Joined 25 May 2010 Posted: 15344 messages Followed by: 1864 members Upvotes: 13060 GMAT Score: 790 M7MBA wrote: Train A leaves the station at 5:00, and travels north at 50 miles per hour. If train B leaves the same station some time later, heading in the same direction as train A, at what time will train B overtake train A? (1) Train B leaves the station at 6:00. (2) Train A travels at 5/6 the speed of train B. Statement 1: From 5pm to 6pm, A travels on its own for 1 hour at a rate of 50 mph, with the result that A travels ahead 50 miles. Since B's rate is unknown, we cannot determine when B catches up to A. INSUFFICIENT. Statement 2: Since A's 50-mph rate is 5/6 of B's rate, we get: 50 = (5/6)B B = (6/5)50 = 60 mph. Since B = 60 mph and A = 50 mph, every hour B travels 10 more miles than A, with the result that B catches up to A at a rate of 10 mph. Since we don't know how far ahead A has traveled, we cannot determine when B catches up to A. INSUFFICIENT. Statements combined: Since B is 50 miles behind A and catches up at a rate of 10 mph, the time for B to catch up = 50/10 = 5 hours. Thus, the time at which B catches up = 6pm + 5 hours = 11pm. SUFFICIENT. The correct answer is C. _________________ Mitch Hunt Private Tutor for the GMAT and GRE GMATGuruNY@gmail.com If you find one of my posts helpful, please take a moment to click on the "UPVOTE" icon. Available for tutoring in NYC and long-distance. For more information, please email me at GMATGuruNY@gmail.com. Student Review #1 Student Review #2 Student Review #3 Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! Sign up now. • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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