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On a certain day it took Bill three times as long to drive

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Intern
Intern
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Joined: 22 Jul 2008
Posts: 44

Kudos [?]: 16 [0], given: 0

On a certain day it took Bill three times as long to drive [#permalink]

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New post 16 Aug 2008, 20:15
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A
B
C
D
E

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On a certain day it took Bill three
times as long to drive from home to
work as it took Sue to drive from
home to work. How many kilometers
did Bill drive from home to work?
(1) Sue drove 10 kilometers from
home to work, and the ratio of
distance driven from home to
work time to drive from home to
work was the same for Bill and
Sue that day.
(2) The ratio of distance driven from
home to work time to drive from
home to work for Sue that day
was 64 kilometers per hour.

Kudos [?]: 16 [0], given: 0

Intern
Intern
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Joined: 02 Aug 2008
Posts: 29

Kudos [?]: 2 [0], given: 0

Re: DS Question - 2 [#permalink]

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New post 16 Aug 2008, 23:30
looks like A to me.

(1) says S and b travel at same speed. And ratio is times spend id known, => ratio is distance can be derived. Once distance is also known for one as 10km => (1) enough.

Now, Ts / Tb is know from Q => Db can be calculated.

(2) Says S's speed is known. B takes 3 time more time, but unless B'speed is know, nothing can be done.

Kudos [?]: 2 [0], given: 0

Re: DS Question - 2   [#permalink] 16 Aug 2008, 23:30
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On a certain day it took Bill three times as long to drive

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