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A cost-effective solution to the problem of airport congestion and the

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Re: A cost-effective solution to the problem of airport congestion and the  [#permalink]

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New post 31 Jan 2018, 06:44
Got this wrong, but immediately realized my mistake.

A cost-effective solution to the problem of airport congestion and the pollution it causes is to provide high-speed train service between major cities in China, lying 300 to 800 kilometers apart. This plan would cost far less than the expansion of existing airports and would reduce the number of airplanes clogging airports and polluting the air.

Which of the following, if true, could opponents of the plan most appropriately cite as a piece of evidence for their objection to the plan?

a. In order to maintain current levels of airport congestion, significant repairs of airports must be undertaken. - maintaining is irrelevant; passage talks of a solution.
b. The high-speed trains that would be used as part of such plan cause more pollution per passenger than do planes. - Correct by POE.
c. The majority of passengers departing from rural airports are flying to destinations in cities over 800 kilometers away. - rural is irrelevant as the passage talks of major cities.
d. Many new airports are being built in areas that are not yet served by high-speed train service. - Strengthener; therefore, unlikely to be used by opponents.
e. A large proportion of air passengers in China take short-distance flights. - Strengthener; therefore, unlikely to be used by opponents.
Source: Veri prep

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Louis
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Re: A cost-effective solution to the problem of airport congestion and the  [#permalink]

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New post 30 Oct 2018, 04:46
TGC wrote:
A cost-effective solution to the problem of airport congestion and the pollution it causes is to provide high-speed train service between major cities in China, lying 300 to 800 kilometers apart. This plan would cost far less than the expansion of existing airports and would reduce the number of airplanes clogging airports and polluting the air.

Which of the following, if true, could opponents of the plan most appropriately cite as a piece of evidence for their objection to the plan?

In order to maintain current levels of airport congestion, significant repairs of airports must be undertaken.
The high-speed trains that would be used as part of such plan cause more pollution per passenger than do planes.
The majority of passengers departing from rural airports are flying to destinations in cities over 800 kilometers away.
Many new airports are being built in areas that are not yet served by high-speed train service.
A large proportion of air passengers in China take short-distance flights.
Source: Veri prep



VeritasKarishma @VeritasPrep GMATNinja

The stimulus provides us no info about the number of passaengers likely to use trains so how can B be a possible weakener as it talks about per capita . If it were that high speed trains would cause more pollution then it would have been likely. But "per capita" takes it too far. I can say instead that the potential ppl using trains are in total fewer than those using planes.
The "per capita term" is what made me eliminate B.

Option E seems more plausible to me as it specifies amount (large propportion) . Also it addresses the distance point . Though i still am not convinced with this answer too...
Please explain
mikemcgarry chetan2u DmitryFarber
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Re: A cost-effective solution to the problem of airport congestion and the  [#permalink]

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New post 31 Oct 2018, 01:00
We don't need to know anything about the number of passengers. The point of B is that even if we get people to trains, there won't be a reduction in pollution, which is one of the two stated goals. If no one switches, obviously nothing will happen (ignoring the pollution from construction), and if people DO switch, it would be worse. Basically, if trains cause 10 units of pollution per person and planes cause 9, then each person who switches will increase pollution by 1 unit, regardless of the scale.

As for E, it does the opposite of what we want. If many people are already traveling these short distances, then there is a large potential market for the trains and they can have their intended effect (assuming B is not true). If people were only flying LONGER distances, then perhaps no one would find it practical to switch to the train.
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Re: A cost-effective solution to the problem of airport congestion and the   [#permalink] 31 Oct 2018, 01:00

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