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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 ## A man in a car observes that he can count 41 electric poles ##### This topic has 1 expert reply and 1 member reply ## A man in a car observes that he can count 41 electric poles A man in a car observes that he can count 41 electric poles in 2 minutes. If each consecutive electric pole is known to be 50 meter apart, what is the speed of the car? (A) 61 km/h (B) 60 km/h (C) 61.5 km/h (D) 60.5 km/h (E) 82 km/h I'm confused how to set up the formulas here. Can any experts help? ### GMAT/MBA Expert GMAT Instructor Joined 04 Oct 2017 Posted: 551 messages Followed by: 11 members Upvotes: 180 Top Reply Hello ardz24. Let's see your question. The man saw 41 electric poles and each consecutive electric pole is known to be 50 meter apart, it implies that the man droves for $$d=41\cdot50=2050\ meters.$$ On the other hand, the man droves during 2 minutes. Now using the formula $$d=v\cdot t\ \Leftrightarrow\ \ v=\frac{d}{t}=\frac{2050mts}{2\ \min}=1025\ \frac{mts}{\min}\cdot\frac{1km}{1000mts}\cdot\frac{60\min}{1\ hour}=61.5\ \frac{k}{h}.$$ So, the correct answer is the option C. I hope this explanation may help you. I'm available if you'd like a follow-up. Regards. _________________ 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. ### Top Member Master | Next Rank: 500 Posts Joined 15 Oct 2009 Posted: 330 messages Upvotes: 27 EconomistGMATTutor wrote: Hello ardz24. Let's see your question. The man saw 41 electric poles and each consecutive electric pole is known to be 50 meter apart, it implies that the man droves for $$d=41\cdot50=2050\ meters.$$ On the other hand, the man droves during 2 minutes. Now using the formula $$d=v\cdot t\ \Leftrightarrow\ \ v=\frac{d}{t}=\frac{2050mts}{2\ \min}=1025\ \frac{mts}{\min}\cdot\frac{1km}{1000mts}\cdot\frac{60\min}{1\ hour}=61.5\ \frac{k}{h}.$$ So, the correct answer is the option C. I hope this explanation may help you. I'm available if you'd like a follow-up. Regards. Isn't the interval between poles the issue ? Between 41 poles there are 40 intervals. • 1 Hour Free 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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