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I must have completely misunderstood this problem

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Intern
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I must have completely misunderstood this problem [#permalink]

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New post 05 Aug 2008, 11:14
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I must have completely misunderstood this problem. :?
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SVP
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Re: GMATPREP square slab [#permalink]

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New post 05 Aug 2008, 13:14
flygmat wrote:
I must have completely misunderstood this problem. :?


c=cost
l = lenght of slab
t = thickenss
k= constant.

C = k * L^2 * t

1) k * L1^2 * t1 +160 = k* L2^2 * t1
L1, t1, L2, t1 are given in the equation .. we can find K.

Subsititu k to find the cost (in original question)..
C = k * L3^2 * t3

suffcieint
2) same as above
Suffciient


D is the answer.
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Re: GMATPREP square slab [#permalink]

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New post 05 Aug 2008, 17:40
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flygmat wrote:
I must have completely misunderstood this problem. :?


say t=thickness and l=length
cost=k(t)(l^2)
now (1) says
k(0.2)(4)=k(4)(0.1)+160 => k can be known and hence is SUFFI to find cost of given plank
(2) says : k(9)(0.1)=k(4)(0.1)+200 => k can be known and hence is SUFFI to find cost of given plank

IMO D
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Re: GMATPREP square slab [#permalink]

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New post 05 Aug 2008, 19:29
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x2suresh wrote:
flygmat wrote:
I must have completely misunderstood this problem. :?


c=cost
l = lenght of slab
t = thickenss
k= constant.

C = k * L^2 * t

1) k * L1^2 * t1 +160 = k* L2^2 * t1
L1, t1, L2, t1 are given in the equation .. we can find K.

Subsititu k to find the cost (in original question)..
C = k * L3^2 * t3

suffcieint
2) same as above
Suffciient


D is the answer.


One more for D. BTW, Nice solution, Suresh. Some of you folks on this forum must consider becoming a Kaplan tutor when you are done with this GMAT thing.

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Re: GMATPREP square slab   [#permalink] 05 Aug 2008, 19:29
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I must have completely misunderstood this problem

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