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# A contractor is hired to construct two concrete retaining walls for th

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Magoosh GMAT Instructor
Joined: 28 Dec 2011
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A contractor is hired to construct two concrete retaining walls for th [#permalink]

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07 Oct 2016, 13:18
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A contractor is hired to construct two concrete retaining walls for the city: Harrison Wall and Jackson Wall. As part of his budget, he needs to calculate the cost of the concrete he will use. For raw materials for the concrete, he has to pay $9.75 per cubic meter of concrete. Harrison Wall will be 35 cm thick, and will have dimensions of 11.5 m long and 8.1 m high. Jackson Wall will be 50 cm thick, and will have dimensions of 31.0 meter long 11.8 m high. In the table, select the value that the closest to the cost of the concrete for Harrison Wall as well as the cost of the concrete for Jackson Wall. Make only two selections, one in each column. Attachment: Harrison & Jackson walls.png [ 10.62 KiB | Viewed 821 times ] For a set of Two-Part Analysis practice questions, see: GMAT Integrated Reasoning: Two-Part Analysis Practice Questions Mike OA: [Reveal] Spoiler: Harrison =$320, Jackson = $1800 _________________ Mike McGarry Magoosh Test Prep Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)  Magoosh Discount Codes Jamboree Discount Codes Veritas Prep GMAT Discount Codes Board of Directors Status: Stepping into my 10 years long dream Joined: 18 Jul 2015 Posts: 3082 Re: A contractor is hired to construct two concrete retaining walls for th [#permalink] ### Show Tags 08 Oct 2016, 00:02 1 This post received KUDOS mikemcgarry wrote: A contractor is hired to construct two concrete retaining walls for the city: Harrison Wall and Jackson Wall. As part of his budget, he needs to calculate the cost of the concrete he will use. For raw materials for the concrete, he has to pay$9.75 per cubic meter of concrete. Harrison Wall will be 35 cm thick, and will have dimensions of 11.5 m long and 8.1 m high. Jackson Wall will be 50 cm thick, and will have dimensions of 31.0 meter long 11.8 m high.

In the table, select the value that the closest to the cost of the concrete for Harrison Wall as well as the cost of the concrete for Jackson Wall. Make only two selections, one in each column.
Attachment:
Harrison & Jackson walls.png

For a set of Two-Part Analysis practice questions, see:
GMAT Integrated Reasoning: Two-Part Analysis Practice Questions

Mike

OA:
[Reveal] Spoiler:
Harrison = $320, Jackson =$1800

Volume of Harrison Wall = 0.35 * 11.5 * 8.1 $$m^3$$

Volume of Jackson Wall = 0.5 * 31 * 11.8 $$m^3$$

Cost of 1 $$m^3$$ of concrete = $9.75 Therefore, Cost of Harrison = 0.35 * 11.5 * 8.1 * 9.75 ~$320

Cost of Jackson = 0.5 * 31 * 11.8 * 9.75 ~ $1800. _________________ How I improved from V21 to V40! ? How to use this forum in THE BEST way? Intern Joined: 23 Nov 2013 Posts: 21 Re: A contractor is hired to construct two concrete retaining walls for th [#permalink] ### Show Tags 06 Feb 2017, 08:01 Cost of Harrison Wall : 9.75 X 0.35 X 11.5 X 8.1 = 317.87 ~$320
Cost of Jackson Wall : 9.75 X 0.5 X 31 X 11.8 = 1782.27 ~ \$1800
Re: A contractor is hired to construct two concrete retaining walls for th   [#permalink] 06 Feb 2017, 08:01
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# A contractor is hired to construct two concrete retaining walls for th

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