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A homeowner is going to pour the foundation for a porch which, when fi

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A homeowner is going to pour the foundation for a porch which, when fi  [#permalink]

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New post 30 Aug 2018, 05:02
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C
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E

Difficulty:

  25% (medium)

Question Stats:

88% (01:22) correct 13% (01:43) wrong based on 28 sessions

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A homeowner is going to pour the foundation for a porch which, when finished will be 8 feet long, 6 feet wide, and 2.5 feet tall. If the homeowner can purchase the required cement for the foundation at two stores, A and B, at which store will the cost of the cement be less?

(1) Store A sells only bags of dry cement powder mix, each of which when mixed with water yields 14 cubic feet of cement and costs $18.
(2) Store B sells only bags of dry cement powder mix, each of which when mixed with water yields 22 cubic feet of cement and costs $24.

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Re: A homeowner is going to pour the foundation for a porch which, when fi  [#permalink]

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New post 30 Aug 2018, 05:41
Bunuel wrote:
A homeowner is going to pour the foundation for a porch which, when finished will be 8 feet long, 6 feet wide, and 2.5 feet tall. If the homeowner can purchase the required cement for the foundation at two stores, A and B, at which store will the cost of the cement be less?

(1) Store A sells only bags of dry cement powder mix, each of which when mixed with water yields 14 cubic feet of cement and costs $18.
(2) Store B sells only bags of dry cement powder mix, each of which when mixed with water yields 22 cubic feet of cement and costs $24.


Question : At which store the cost of the cement will be less?

Statement 1: Store A sells only bags of dry cement powder mix, each of which when mixed with water yields 14 cubic feet of cement and costs $18.

The cost of cement at store A can be calculated but the cost of cement at store B is unknown for comparison hence

NOT SUFFICIENT

Statement 2: Store B sells only bags of dry cement powder mix, each of which when mixed with water yields 22 cubic feet of cement and costs $24.

The cost of cement at store B can be calculated but the cost of cement at store A is unknown for comparison hence

NOT SUFFICIENT

Combining the two statements

Now we can compare that Cost of cement per cubic feet at Store A = 18/14 and cost of cement per cubic feet at Store B = 24/22

hence Cost at Store B is less than cost at store A hence

SUFFICIENT

Answer: Option C
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Re: A homeowner is going to pour the foundation for a porch which, when fi   [#permalink] 30 Aug 2018, 05:41
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