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20 Dec 2011, 07:47
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
72% (01:00) correct
28%
(01:22)
wrong
based on 919
sessions
History
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Time
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How many hours did it take Dale to drive from A-town to B-town?
(1) If Dale’s average speed for the trip had been three times as fast, the trip would have taken 2 hours.
(2) The distance from A-town to B-town is 100 miles.
(1) If Dale’s average speed for the trip had been three times as fast, the trip would have taken 2 hours.
(2) The distance from A-town to B-town is 100 miles.
20 Dec 2011, 11:41
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The mathematical expression only seems to complicate things and requires quite a few steps. Thinking about the problem logically, on the other hand, can allow you to deal with (1) in a matter of seconds.
If Dale triples his average speed, then he spends 1/3 less time on the trip. Because he spends 2 hours completing the trip at triple the speed, the original trip would have taken him 6 hours. SUFFICIENT
For (2) we are only given the distance between two cities, A and B. Nowhere is there any rate, so we cannot answer the question. INSUFFICIENT
A.
If Dale triples his average speed, then he spends 1/3 less time on the trip. Because he spends 2 hours completing the trip at triple the speed, the original trip would have taken him 6 hours. SUFFICIENT
For (2) we are only given the distance between two cities, A and B. Nowhere is there any rate, so we cannot answer the question. INSUFFICIENT
A.
20 Dec 2011, 21:16
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Statement 1 is sufficient
T = D/S
2 = D/3S
6 = D/S
T = D/S = 6
Statement 2 gives
T = 100/S
so the value of T depends on the unknown value of S. Insufficient.
T = D/S
2 = D/3S
6 = D/S
T = D/S = 6
Statement 2 gives
T = 100/S
so the value of T depends on the unknown value of S. Insufficient.
