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How many hours did Suresh travel yesterday?

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How many hours did Suresh travel yesterday? [#permalink] New post 19 Mar 2013, 23:11
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Question Stats:

7% (01:37) correct 92% (00:19) wrong based on 1 sessions
How many hours did Suresh travel yesterday?

(1) Yesterday, Suresh traveled from 1 A.M. to 1P.M. without a break.
(2) Yesterday, Suresh traveled half the total number of hours he traveled the day before yesterday.
[Reveal] Spoiler: OA

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Re: How many hours did Suresh travel yesterday? [#permalink] New post 21 Mar 2013, 02:47
Do you have an explanation for your answer? I arrived at A because it says suresh travelled from 1am to 1pm "yesterday". So all the travelling was done yesterday and he travelled for 13 hours "yesterday".
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Re: How many hours did Suresh travel yesterday? [#permalink] New post 21 Mar 2013, 05:12
SravnaTestPrep wrote:
How many hours did Suresh travel yesterday?

(1) Yesterday, Suresh traveled from 1 A.M. to 1P.M. without a break.
(2) Yesterday, Suresh traveled half the total number of hours he traveled the day before yesterday.



Solution:

From statement 1 we know Suresh traveled for AT LEAST 12 hours yesterday. This is not sufficient by itself to answer the question

From statement 2 we know Suresh traveled for half the number of hours he traveled day before yesterday. We cannot determine the exact number of hours he traveled yesterday from this statement

But from both the statements, we can know that Suresh traveled 24 hours day before yesterday because he traveled double the number of hours he traveled yesterday (statement 2), which is 12 hrs(statement 1). So the number of hours he traveled day before yesterday can be determined because he could not have traveled for more time. Consequently the number of hours traveled yesterday can be determined.

So answer is choice C.
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Srinivasan Vaidyaraman
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Re: How many hours did Suresh travel yesterday?   [#permalink] 21 Mar 2013, 05:12
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