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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 truck travelling at 70 MPH uses 30% more gasoline... tagged by: BTGmoderatorLU ##### This topic has 2 expert replies and 0 member replies ### Top Member ## A truck travelling at 70 MPH uses 30% more gasoline... A truck traveling at 70 MPH uses 30% more gasoline to travel a certain distance than at 50 MPH. If the truck can travel 19.5 miles on a liter of gasoline at 50 MPH, how far the truck can travel at 70 MPH on 10 liters of gasoline? A. 100 B. 150 C. 175 D. 200 E. 125 The OA is B. I'm confused by this PS question. Experts, any suggestion about how to solve it? If at a rate of 50 MPH the truck covers 19.5 miles/L, then at 70 MPH uses 30% more gasoline, that's mean 1.3 Liter to travel 19.5 miles. I stuck here! Can any experts help me, please? Thanks in advance. ### GMAT/MBA Expert GMAT Instructor Joined 04 Oct 2017 Posted: 551 messages Followed by: 11 members Upvotes: 180 Quote: A truck traveling at 70 MPH uses 30% more gasoline to travel a certain distance than at 50 MPH. If the truck can travel 19.5 miles on a liter of gasoline at 50 MPH, how far the truck can travel at 70 MPH on 10 liters of gasoline? A. 100 B. 150 C. 175 D. 200 E. 125 The OA is B. I'm confused by this PS question. Experts, any suggestion about how to solve it? If at a rate of 50 MPH the truck covers 19.5 miles/L, then at 70 MPH uses 30% more gasoline, that's mean 1.3 Liter to travel 19.5 miles. I stuck here! Can any experts help me, please? Thanks in advance. Hi LUANDATO, You are following the correct approach. Yes, at 70MPH it uses 30% more gasoline, which means that it will consume 1.3L to travel 19.5 miles. Now we will calculate, how long will it travel at 70MPH in 1 liter as: $$=\frac{19.5\ miles}{1.3\ L}=15miles/L$$ Now we can calculate the distance traveled by the truck at 70 MPH on 10 liters of gasoline as: $$=15\times10=150\ miles$$ Therefore, Option B is correct. Hope it helps. I am available if you'd like any 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. ### GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2950 messages Followed by: 19 members Upvotes: 43 BTGmoderatorLU wrote: A truck traveling at 70 MPH uses 30% more gasoline to travel a certain distance than at 50 MPH. If the truck can travel 19.5 miles on a liter of gasoline at 50 MPH, how far the truck can travel at 70 MPH on 10 liters of gasoline? A. 100 B. 150 C. 175 D. 200 E. 125 We are given that the truck travels 19.5 miles on one liter of gasoline when traveling at 50 mph. Assuming the distance is 50 miles, then it uses 50/19.5 = 500/195 = 100/39 liters of gasoline to travel 50 miles. Since the truck use 30% more gasoline to travel the same distance at 70 mph than at 50 mph, the truck uses 100/39 x 1.3 = 130/39 = 10/3 liters of gasoline to travel 50 miles when traveling at 70 mph. Since 10/(10/3) = 3, the truck can travel 3 times the distance of 50 miles on 10 liters of gasoline; thus, the truck can travel 150 miles on 10 liters of gasoline when traveling at 70 mph. Alternate Solution: If the truck uses 30% more gasoline at 70 mph, then the truck will need 1.3 liters of gasoline to travel 19.5 miles at 70 mph. If 1.3 liters of gasoline is needed to travel 19.5 miles, the number of miles, say x, that can be traveled using 10 liters of gasoline can be found using the following proportion: 19.5/x = 1.3/10 1.3x = 195 13x = 1950 x = 150 Answer: B _________________ Scott Woodbury-Stewart Founder and CEO scott@targettestprep.com See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • 1 Hour Free BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Free Practice Test & Review How would you score if you took the GMAT Available with Beat the GMAT members only code • 5 Day FREE Trial Study Smarter, Not Harder Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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