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

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Magoosh GMAT Instructor
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A contractor is hired to construct two concrete retaining walls for th  [#permalink]

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New post 07 Oct 2016, 14:18
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
Harrison & Jackson walls.png [ 10.62 KiB | Viewed 905 times ]


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

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OA:
Harrison = $320, Jackson = $1800

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Re: A contractor is hired to construct two concrete retaining walls for th  [#permalink]

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New post 08 Oct 2016, 01:02
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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:
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.
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Re: A contractor is hired to construct two concrete retaining walls for th  [#permalink]

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New post 06 Feb 2017, 09:01
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 &nbs [#permalink] 06 Feb 2017, 09:01
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