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# What is the minimum number of rectangular tiles, each 12 centimeters

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Math Expert
Joined: 02 Sep 2009
Posts: 55670
What is the minimum number of rectangular tiles, each 12 centimeters  [#permalink]

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11 Jan 2019, 00:27
00:00

Difficulty:

25% (medium)

Question Stats:

79% (00:53) correct 21% (00:37) wrong based on 19 sessions

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What is the minimum number of rectangular tiles, each 12 centimeters by 18 centimeters, needed to completely cover five flat rectangular surfaces, each 60 centimeters by 180 centimeters?

A. 50
B. 100
C. 150
D. 200
E. 250

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Re: What is the minimum number of rectangular tiles, each 12 centimeters  [#permalink]

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11 Jan 2019, 00:31
= 5*60*180 = total area

Tile area12*18=( 180+36)=216

No of tiles = 5*12*5*18*10/12*18=250

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Re: What is the minimum number of rectangular tiles, each 12 centimeters  [#permalink]

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11 Jan 2019, 00:45
riyarush2007, Welcome to the GMAT Club!

Try to post explanations to why you think the answer is what you think it is. That will add to your knowledge as well as that of any potential readers.

riyarush2007 wrote:

Posted from my mobile device

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Re: What is the minimum number of rectangular tiles, each 12 centimeters  [#permalink]

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11 Jan 2019, 02:46
Bunuel wrote:
What is the minimum number of rectangular tiles, each 12 centimeters by 18 centimeters, needed to completely cover five flat rectangular surfaces, each 60 centimeters by 180 centimeters?

A. 50
B. 100
C. 150
D. 200
E. 250

make a relationship from the given info

5*60*80 / 12 * 18
=> 250
IMO E
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Re: What is the minimum number of rectangular tiles, each 12 centimeters   [#permalink] 11 Jan 2019, 02:46
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