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.
The OA is A.
Please, can anyone explain this DS question? I tried to solve it but I'm not sure. I need help. Thanks.
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How many hours did it take Dale to drive from A-town to
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swerve wrote: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./quote]
Rate and time have a RECIPROCAL RELATIONSHIP.
1/2 AS FAST implies TWICE THE TIME.
1/5 OF THE TIME implies 5 TIMES AS FAST.
Statement 1:
3 times as fast implies 1/3 of the time.
Since 1/3 of the normal time is equal to 2 hours, we get:
(1/3)t = 2
t = 6 hours.
SUFFICIENT.
Statement 2:
Here, the time can be any positive value.
INSUFFICIENT.
The correct answer is A.
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My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
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