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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 rectangular wall has dimensions of 800 by 300. If the wall tagged by: Max@Math Revolution ##### This topic has 4 expert replies and 0 member replies ### GMAT/MBA Expert ## A rectangular wall has dimensions of 800 by 300. If the wall ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult [Math Revolution GMAT math practice question] A rectangular wall has dimensions of 800 by 300. If the wall is tiled using tiles measuring 12 x 25 of the same units, how many tiles are used? A. 360 B. 400 C. 500 D. 600 E. 800 _________________ Math Revolution Finish GMAT Quant Section with 10 minutes to spare. The one-and-only Worldâ€™s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. Only$149 for 3 month Online Course
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Max@Math Revolution wrote:
[Math Revolution GMAT math practice question]

A rectangular wall has dimensions of 800 by 300. If the wall is tiled using tiles measuring 12 x 25 of the same units, how many tiles are used?

A. 360
B. 400
C. 500
D. 600
E. 800
number of tiles = (wall area)/(tile area) = (800*300)/(25*12) = 32*25 = 800.

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Max@Math Revolution wrote:
[Math Revolution GMAT math practice question]

A rectangular wall has dimensions of 800 by 300. If the wall is tiled using tiles measuring 12 x 25 of the same units, how many tiles are used?

A. 360
B. 400
C. 500
D. 600
E. 800
Trivial application of UNITS CONTROL, one of the most powerful tools of our method!

(We assume the units length is centimeters, just for didactic reasons.)

$$?\,\,\, = \,\,\,800 \cdot 300\,\,{\rm{c}}{{\rm{m}}^2}\,\,\left( {{{1\,\,{\rm{tile}}} \over {12\, \cdot 25\,\,{\rm{c}}{{\rm{m}}^2}}}} \right)\,\,\,\, = \,\,\,\,{{800 \cdot 3 \cdot 4 \cdot 25} \over {3 \cdot 4 \cdot 25}}\,\,{\rm{tiles}}\,\,\, = \,\,\,800\,\,\,{\rm{tiles}}$$

This solution follows the notations and rationale taught in the GMATH method.

Regards,
Fabio.

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Now, 800 / 25 = 32 and 300 / 12 = 25. Thus, the number of tiles required is 32 * 25 = 800.

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Only $149 for 3 month Online Course Free Resources-30 day online access & Diagnostic Test Unlimited Access to over 120 free video lessons-try it yourself Email to : info@mathrevolution.com ### GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2791 messages Followed by: 18 members Upvotes: 43 Max@Math Revolution wrote: [Math Revolution GMAT math practice question] A rectangular wall has dimensions of 800 by 300. If the wall is tiled using tiles measuring 12 x 25 of the same units, how many tiles are used? A. 360 B. 400 C. 500 D. 600 E. 800 The number of tiles used is: (800 x 300)/(12 x 25) = (800 x 300)/300 = 800 Answer: E _________________ 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 • 1 Hour Free BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • Award-winning private GMAT tutoring Register now and save up to$200

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