On a certain day it took Bill three times as long to drive : DS Archive
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# On a certain day it took Bill three times as long to drive

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Joined: 03 Sep 2005
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On a certain day it took Bill three times as long to drive [#permalink]

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08 Sep 2005, 00:50
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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.

Will someone please explain their logic? I'll post OA soon!
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08 Sep 2005, 04:44
assume X is the time taken by sue
3X is the time taken by Bill
st 1: sue drove 10 km to work; ratio is 10/X
Bill ratio is 30/3X
So Bill drove 30 km
St 2; not suff

A
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08 Sep 2005, 07:22
I Dont think its A.

From the first condition we can say that

distance travelled by Sue = 10 km

and the ratio of distance/time of Sue = ratio of distance/time of Bill

But we don't know the exact speed so we cant tell the distance.

It's insufficient

From the Secound condition we can say that

Sue speed is 64 Km/hr

It's insufficient

So,The Ans is C

Kindly correct me If I am Wrong
08 Sep 2005, 07:22
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# On a certain day it took Bill three times as long to drive

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