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2PA --- painting Harrison & Jackson walls

Data Sufficiency, Multi-Source Reasoning, Table Analysis, Graphics Interpretation, Two-Part Analysis
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by Mike@Magoosh » Wed Sep 04, 2013 12:49 pm
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.

The table of choices is displayed below. For more 2PA practice questions, as well as the answer and solution to this, see:
https://magoosh.com/gmat/2013/gmat-integ ... questions/

Mike :-)
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by sahilchaudhary » Sun Oct 20, 2013 10:15 pm
It seems to be a really easy question.

Harrison Wall - (11.5 * 8.1 * 0.35) * 9.75 = $317
Jackson Wall - (31 * 11.8 * 0.50) * 9.75 = $1783

So the answers are $320 for Harrison and $1800 for Jackson.
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by Mike@Magoosh » Mon Oct 21, 2013 9:54 am
sahilchaudhary wrote:It seems to be a really easy question.

Harrison Wall - (11.5 * 8.1 * 0.35) * 9.75 = $317
Jackson Wall - (31 * 11.8 * 0.50) * 9.75 = $1783

So the answers are $320 for Harrison and $1800 for Jackson.
Dear sahilchaudhary,
Very good! Just to play Devil's Advocate, did you do all this without a calculator? Do you recommend that others do this sort of calculation without a calculator?
Mike :-)
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