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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 ## Jerry and Ross decide to have a footrace. They run 1,000... tagged by: BTGmoderatorLU ##### This topic has 1 expert reply and 0 member replies ### Top Member ## Jerry and Ross decide to have a footrace. They run 1,000... Jerry and Ross decide to have a footrace. They run 1,000 meters. Jerry runs 5 meters per second and Ross 4 meters per second. Halfway through the race, Jerry realizes he is ahead and stops running for one full minute before finishing the race at the same speed. Who wins the race? A. Jerry B. Ross C. Both The OA is B. I need to determine the total time that each one takes to complete the 1,000 meters, then $$T_{Jerry}=\frac{1000}{5}+60=260$$ and $$T_{Ross}=\frac{1000}{4}=250$$ That's mean Ross wins the race, right? Experts, any suggestion about this PS question? Thanks in advance. ### GMAT/MBA Expert GMAT Instructor Joined 04 Oct 2017 Posted: 551 messages Followed by: 11 members Upvotes: 180 LUANDATO wrote: Jerry and Ross decide to have a footrace. They run 1,000 meters. Jerry runs 5 meters per second and Ross 4 meters per second. Halfway through the race, Jerry realizes he is ahead and stops running for one full minute before finishing the race at the same speed. Who wins the race? A. Jerry B. Ross C. Both The OA is B. I need to determine the total time that each one takes to complete the 1,000 meters, then $$T_{Jerry}=\frac{1000}{5}+60=260$$ and $$T_{Ross}=\frac{1000}{4}=250$$ That's mean Ross wins the race, right? Experts, any suggestion about this PS question? Thanks in advance. Hello LUANDATO. Your answer is great and very fast. Another way you can do it (but is a bit longer than yours) is the following: Jerry ran at 5 mts/sec during 500 meters, then they ran during $$t=\frac{500}{5}=100\ \text{seconds}$$ On the other hand, in 100 secs Ross ran $$d=4\cdot100=400\ mts$$ At this point, the distance between them is 100 meters. Now, Jerry stopped for 1 minute=60 seconds. During this time Ross continued running and he advanced: $$d=4\cdot60=240\ mts$$ At this moment, Jerry has run 500 meters and Ross 400+240=640 meters. Now, the race starts again. The question is: who arrives first? To answer this, we calculate the time need for each one arrives to the finish. Jerry left 500 meters, hence his time will be $$t=\frac{500}{5}=100\ \text{seconds}$$ and Ross left 360 meters, hence his time is $$t=\frac{360}{4}=90\ \text{seconds}$$ This implies that Ross won the race. I hope this answer also can help you. I'm available f you'd like a follow-up. _________________ GMAT Prep From The Economist We offer 70+ point score improvement money back guarantee. Our average student improves 98 points. Free 7-Day Test Prep with Economist GMAT Tutor - Receive free access to the top-rated GMAT prep course including a 1-on-1 strategy session, 2 full-length tests, and 5 ask-a-tutor messages. Get started now. • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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