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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 architects of a certain type of building estimate ##### This topic has 2 expert replies and 0 member replies ### Top Member ## The architects of a certain type of building estimate ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult The architects of a certain type of building estimate construction costs to be$2.0 million per floor for each of the first 5 floors, $2.5 million per floor for each of the next 3 floors, and$3.5 million per floor for any additional floors. What would the architects estimate the construction costs to be for a building of this type with 10 floors?

A. $23.0 million B.$23.5 million

C. $24.0 million D.$24.5 million

E. $25.0 million OA D Source: GMAT Prep ### GMAT/MBA Expert Elite Legendary Member Joined 23 Jun 2013 Posted: 10129 messages Followed by: 494 members Upvotes: 2867 GMAT Score: 800 Hi All, We're told that the architects of a certain type of building estimate construction costs to be$2.0 million per floor for each of the first 5 floors, $2.5 million per floor for each of the next 3 floors, and$3.5 million per floor for any additional floors. We're asked what the architects would estimate the construction costs to be for a building of this type with 10 floors. This question is ultimately just about Arithmetic, but since the answers are relatively 'close together', we have to be careful about doing detailed work (or we might get one of the wrong answers).

According to the given information:
Each of the first 5 floors costs $2 million each --> (5)($2 million) = $10 million Each of the next 3 floors costs$2.5 million each --> (3)($2.5 million) =$7.5 million
Each additional floor costs $3.5 million each --> (2)($3.5million) = $7 million Total =$10 million + $7.5 million +$7 million = $24.5 million Final Answer: D GMAT assassins aren't born, they're made, Rich _________________ Contact Rich at Rich.C@empowergmat.com ### GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2424 messages Followed by: 18 members Upvotes: 43 BTGmoderatorDC wrote: The architects of a certain type of building estimate construction costs to be$2.0 million per floor for each of the first 5 floors, $2.5 million per floor for each of the next 3 floors, and$3.5 million per floor for any additional floors. What would the architects estimate the construction costs to be for a building of this type with 10 floors?

A. $23.0 million B.$23.5 million

C. $24.0 million D.$24.5 million

E. $25.0 million OA D Source: GMAT Prep For a 10-floor building, the cost is: 2.0 x 5 + 2.5 x 3 + 3.5 x 2 = 10 + 7.5 + 7 =$24.5 million.

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