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While driving on the expressway, did Robin ever exceed

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Senior Manager
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While driving on the expressway, did Robin ever exceed [#permalink] New post 12 Feb 2007, 20:09
00:00
A
B
C
D
E

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93) While driving on the expressway, did Robin ever exceed the 55-miles-per-hour speed limit?
(1) Robin drove 100 miles on the expressway.
(2) Robin drove for 2 hours on the expressway.

96) If Bush had a doctor's appointment on a certain day, was the appointment on a Wednesday?
(1) Exactly 60 hours before the appointment, it was Monday
(2) The appointment was between 1:00 p.m. and 9:00 p.m.
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 [#permalink] New post 12 Feb 2007, 21:37
Quote:
93) While driving on the expressway, did Robin ever exceed the 55-miles-per-hour speed limit?
(1) Robin drove 100 miles on the expressway.
(2) Robin drove for 2 hours on the expressway.
In order for Robin to reach her destination in 2hrs she'd need to maintain an avg. speed of 50 mph. She could driven 50 mph for all 2 hrs, she could have driven 75 mph for 1 hr. and 25 mph for the other hr. etc. Both INS, choice E.

Quote:
96) If Bush had a doctor's appointment on a certain day, was the appointment on a Wednesday?
(1) Exactly 60 hours before the appointment, it was Monday Assume, the apt. was at 11:59p on Wed night. Now, assume it's Monday morning, 12:01a. Wed 11:59p is exactly 48 hrs. later. SUFF, choice A.
(2) The appointment was between 1:00 p.m. and 9:00 p.m. INS
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 [#permalink] New post 12 Feb 2007, 23:40
#93.
(1) insuff.
It's asking for her INSTANTANEOUS speed...distance alone is not sufficient.
(2) insuff.
We do not know the distance. If she drove for 2 hrs on a distance of 50,000 miles, her speed must've been REALLY fast... whereas 2 hrs on 10 miles, she could drive slowly...
(1) + (2) insuff.
We know the distance and we know the time. According to s = vt (s distance v speed t time) we may find out the AVERAGE speed. However, the question is asking for her INSTANTANEOUS speed. She could've driven at 100mph for 2 seconds and drove the rest at 49.9999mph. The fact that the question is asking for her INSTANTANEOUS speed pretty much says all...
THE ANSWER IS E

#94.
(1) insuff.
00:01 is Monday and 60 hrs later is 12:01 Wednesday. But!
23:59 is Monday and 60 hrs later is 11:59 Thursday.
So the app could have been on both days.
(2) insuff.
Friday 2 PM? Thursday 5PM?
(1) + (2) suff.
Let's see the extremes.
If the app was on Wednesday 9 PM, then 60 hrs before was 9 AM Monday.
If the app was on Wednesday 1 PM, then 60 hrs before was 1 AM Monday.
However, if the app was on Thursday at 1 PM, then 60 hrs before was 1 AM Tuesday (not Monday!) If the app was on Tuesday, then it's obvious that 60 hrs back is not Monday.
THE ANSWER IS C

Would #94 be a medium-level question?
  [#permalink] 12 Feb 2007, 23:40
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While driving on the expressway, did Robin ever exceed

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