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11 Aug 2014, 21:20
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
58% (01:54) correct
42%
(01:51)
wrong
based on 331
sessions
History
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A rat in a maze starts walking 6 feet in a straight line, then immediately turns right and walks y feet more before pausing. The rat then walks in a straight line back to where it started, and then, without pausing, continues walking in this direction for another 2 feet before it stops. For how much time did the rat spend walking?
(1) y = 8
(2) The rat completed its walk 6 minutes after it started walking.
(1) y = 8
(2) The rat completed its walk 6 minutes after it started walking.
11 Aug 2014, 21:20
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OA
Correct Answer: E
Explanation:
(1) This allows us to calculate the length of the rat's walk in feet. The rat walked 6 feet, then 8 feet, then 10 feet (since the rat's path has described a right triangle back to the starting point, and the lengths 6, 8, and 10 are multiples of a 3 : 4 : 5 triangle. The rat then continues for 2 feet, so we have all the lengths: 6, 8, 10, and 2. That sums to 26 feet, but does not give us the time spent walking. Accordingly, the statement is insufficient.
(2) This gives us the complete time of the rat's "journey," but we don't know the length of the time spent walking, as opposed to pausing. This statement is also insufficient. Even when we take the statements together, we are not provided a rate via which to use the distance given in statement 1 to find the time spent traveling, nor do we have information regarding the duration of the rat's pause to be able to make use of the time given in statement 2. Accordingly, the correct answer is E.
Correct Answer: E
Explanation:
(1) This allows us to calculate the length of the rat's walk in feet. The rat walked 6 feet, then 8 feet, then 10 feet (since the rat's path has described a right triangle back to the starting point, and the lengths 6, 8, and 10 are multiples of a 3 : 4 : 5 triangle. The rat then continues for 2 feet, so we have all the lengths: 6, 8, 10, and 2. That sums to 26 feet, but does not give us the time spent walking. Accordingly, the statement is insufficient.
(2) This gives us the complete time of the rat's "journey," but we don't know the length of the time spent walking, as opposed to pausing. This statement is also insufficient. Even when we take the statements together, we are not provided a rate via which to use the distance given in statement 1 to find the time spent traveling, nor do we have information regarding the duration of the rat's pause to be able to make use of the time given in statement 2. Accordingly, the correct answer is E.
11 Aug 2014, 21:22
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In my view, the correct answer should be B because we're getting the Total Time. We know that the rate didn't spend any time pausing.. So the answer should be 6 mins.
Hence (b)
Can someone please explain what my error is?
Expert help would be much appreciated.
Thanks in adv.
Hence (b)
Can someone please explain what my error is?
Expert help would be much appreciated.
Thanks in adv.
