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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 ## If a rectangle With Width 49.872 inches and length 30.64. . tagged by: M7MBA ##### This topic has 1 expert reply and 0 member replies ### Top Member ## If a rectangle With Width 49.872 inches and length 30.64. . If a rectangle With Width 49.872 inches and length 30.64 inches has an area that is 15 times the area of a certain square, which of the following is the closest approximation to the length, in inches, of a side of that square? (A)5 (B)10 (C)15 (D)20 (E)25 The OA is B. Should I multiply the numbers or can I work with approximations? ### GMAT/MBA Expert GMAT Instructor Joined 04 Oct 2017 Posted: 551 messages Followed by: 11 members Upvotes: 180 Hello M7MBA. The area of a rectangle is $$A_R=W\cdot L.$$ Let's take the aproximations $$W\approx50\ and\ L\approx30.$$ So, we will get $$A_R\approx50\cdot30\approx1500.$$ Now, the area of a square is $$A_S=a^2$$ where a is the length of each side. Now, we can set the equation $$A_R=15\cdot A_S\ <=>\ 1500\approx15\cdot a^2$$ $$a^2\approx100\ <=>a\approx10.$$ So, the answer is option B. I hope this can help you. I'm 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. • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • 1 Hour Free BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Award-winning private GMAT tutoring Register now and save up to$200

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