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The morning after a snowstorm had left a uniform amount of snow on ...

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The morning after a snowstorm had left a uniform amount of snow on ...  [#permalink]

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New post 30 Mar 2019, 10:59
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

88% (02:10) correct 12% (02:01) wrong based on 52 sessions

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The morning after a snowstorm had left a uniform amount of snow on each driveway on the block, Homeowner R turned on his automatic driveway heater to help melt the snow away. The snow on this homeowner's driveway melted quickly because the automatic driveway heater is designed to pump warm water into pipes that are situated just below the surface of the driveway.

Which of the following, if true, most seriously jeopardizes the validity of the explanation for the speed with which the snow melted on the driveway belonging to Homeowner R?

A) The same snowstorm mentioned above left much less snow on the driveways of homeowners in a neighboring town, and the snow there melted quickly without the use of automatic driveway heaters.

B) Even though Homeowner S, who lives on the same block as Homeowner R, made no effort to melt the snow on his driveway, the snow on Homeowner S's driveway melted just as fast as the snow melted on the driveway with the automatic heater.

C) Homeowner T, who lives on the same block as Homeowner R, shovels the snow off of his driveway rather than investing in an automatic driveway heater.

D) Automatic driveway heaters are expensive to install since they require that the existing driveway be completely removed in order to install the necessary pipes.

E) The automatic driveway heater used by Homeowner R operates with its own water heater so that it can work efficiently even when people in the house are using warm water to take showers, to do the laundry, or for other uses.

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Re: The morning after a snowstorm had left a uniform amount of snow on ...  [#permalink]

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New post 30 Mar 2019, 11:47
Facts:
1. The morning after a snowstorm had left a uniform amount of snow on each driveway on the block,
2. Homeowner R turned on his automatic driveway heater to help melt the snow away.

Conclusion:
The snow on this homeowner's driveway melted quickly because the automatic driveway heater is designed to pump warm water into pipes that are situated just below the surface of the driveway.

We need to find an option which weakens.
If any option states that the snow on a different driveway within the same block melted just as fast as the snow on the driveway near R without using a driveway heater, then that would be our answer.

Option A: Mentions about a neighbouring town. A is out.

Option B: The snow on a different driveway within the same block as of R melted just as fast, without any extra effort. This weakens the conclusion. This is our answer.

Option C: Doesn't mention anything about melting of the ice. C is out.

Option D: Same as C. D is out.

Option E: It talks about driveway heater. E is out as well.

IMO answer is B.

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Re: The morning after a snowstorm had left a uniform amount of snow on ...  [#permalink]

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New post 31 Mar 2019, 03:43
Answer: B
Cause: heating & Effect: melting
B says “w/o heating ( w/o cause) the melting (effect) happens” : weaken the argument

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Re: The morning after a snowstorm had left a uniform amount of snow on ...   [#permalink] 31 Mar 2019, 03:43
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