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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 ## The distance between Omaha and Lincoln... tagged by: BTGmoderatorLU ##### This topic has 3 expert replies and 0 member replies ### Top Member ## The distance between Omaha and Lincoln... The distance between Omaha and Lincoln is 50 miles. Justin drives a car that gets 30 miles per gallon of gas, and Kayla drives a car that gets 20 miles per gallon. How many more gallons of gas does Kayla use on a round trip from Omaha to Lincoln? A. 1 B. 1 2/3 C. 2 2/3 D. 3 E. 5 The OA is B. I'm confused with this PS question. Experts, any suggestion? I'm not sure why that is the correct question. Thanks in advance. ### GMAT/MBA Expert GMAT Instructor Joined 04 Oct 2017 Posted: 551 messages Followed by: 11 members Upvotes: 180 Top Reply Quote: The distance between Omaha and Lincoln is 50 miles. Justin drives a car that gets 30 miles per gallon of gas, and Kayla drives a car that gets 20 miles per gallon. How many more gallons of gas does Kayla use on a round trip from Omaha to Lincoln? A. 1 B. 1 2/3 C. 2 2/3 D. 3 E. 5 The OA is B. I'm confused with this PS question. Experts, any suggestion? I'm not sure why that is the correct question. Thanks in advance. Hi LUANDATO, Let's take a look at your question. The distance between Omaha and Lincoln is 50 miles, therefore, to take a round trip Justin and Kayla have to cover a distance of 100 miles. Justin drives a car that gets 30 miles per gallon of gas, Let's find the number of gallons it consumes for 100 miles. For 30 miles Jason's car consumes gas = 1 gallon For 1 mile Jason's car consumes gas = 1/30 gallon For 100 miles Jason's car consumes gas = 100 * (1/30) gallons = 100/30 = 10/3 gallons Similarly, we will find the number of gallons Kayla's car consumes for covering a distance of 100 miles. For 20 miles Kayla's car consumes gas = 1 gallon For 1 mile Kayla's car consumes gas = 1/20 gallon For 100 miles Kayla's car consumes gas = 100 * (1/20) gallons = 100/20 = 5 gallons We are asked to find how many more gallons of gas does Kayla use on a round trip from Omaha to Lincoln, so we will subtract the consumption of both the cars. $$=\ 5-\frac{10}{3}$$ $$=\ \frac{15-10}{3}$$ $$=\ \frac{15-10}{3}=\frac{5}{3}=1\ \frac{2}{3}\ gallons$$ 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 Legendary Member Joined 20 Jul 2017 Posted: 503 messages Followed by: 11 members Upvotes: 86 GMAT Score: 770 First, let's find how many gallons of gas each person uses on a round trip. We know that the distance from Omaha to Lincoln is 50 miles. Since they're doing a round trip, they are going twice that distance - 50 miles from Omaha to Lincoln and then 50 miles from Lincoln back to Omaha. This gives a 100 mile trip in total. Justin gets 30 miles per gallon of gas - in other words, he uses 1 gallon every 30 miles. So in a 100 mile trip, he uses $$100\ miles\ \cdot\frac{1\ gallon}{30\ miles}=\frac{10}{3}\ gallons=3\frac{1}{3}\ gallons$$ Kayla gets 20 miles per gallon of gas - in other words, she uses 1 gallon every 20 miles. So in a 100 mile trip, she uses $$100\ miles\ \cdot\frac{1\ gallon}{20\ miles}=5\ gallons$$ To find how many more gallons Kayla used than Justin, we can subtract the number of gallons Justin used from the number of gallons Kayla used $$5\ gallons\ -\ 3\frac{1}{3}\ gallons\ =\ 1\frac{2}{3}\ gallons$$ This gives us the correct answer, B. _________________ Erika John - Content Manager/Lead Instructor https://gmat.prepscholar.com/gmat/s/ Get tutoring from me or another PrepScholar GMAT expert: https://gmat.prepscholar.com/gmat/s/tutoring/ Learn about our exclusive savings for BTG members (up to 25% off) and our 5 day free trial Check out our PrepScholar GMAT YouTube channel, and read our expert guides on the PrepScholar GMAT blog ### GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2950 messages Followed by: 19 members Upvotes: 43 LUANDATO wrote: The distance between Omaha and Lincoln is 50 miles. Justin drives a car that gets 30 miles per gallon of gas, and Kayla drives a car that gets 20 miles per gallon. How many more gallons of gas does Kayla use on a round trip from Omaha to Lincoln? A. 1 B. 1 2/3 C. 2 2/3 D. 3 E. 5 On a round trip from Omaha to Lincoln Justin uses 100/30 = 10/3 = 3 1/3 gallons, and Kayla uses 100/20 = 5 gallons. Thus, Kaylar uses 1 2/3 more gallons of gas. 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 Study Smarter, Not Harder Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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