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

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SVP
Joined: 07 Nov 2007
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Location: New York
On a certain day it took Bill three times as long to drive [#permalink]

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07 Aug 2008, 10:32
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15. 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.
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Director
Joined: 10 Sep 2007
Posts: 934
Re: DS bill [#permalink]

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07 Aug 2008, 10:51
Statement 1:
(1) This tells us Bill's speed and Sue' speed is same. It also tells us Sue drove 10 KM. So Bill drove 3*10 = 30 KM. So answer is A or D.

(2) This tells us Sue's speed was 64 KMPH. But no relation ship is given to Bill's speed, so this is insufficient.

VP
Joined: 17 Jun 2008
Posts: 1373
Re: DS bill [#permalink]

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07 Aug 2008, 16:23
x2suresh wrote:
15. 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.

(1) indicates Sue's dist = 10 KM no mention of bill dist.but speed of both are said equal.-> INSUFFI
(2)speed of sue is =64km/h does not give bill's dist -> INSUFFI

(1) and (2) => indicate sue's time =10/64 and hence bill's time=3*10/64 hrs
also speed of twoo equal =64km/h

hence bill's time,speed known dist can be evaluated.... SUFFI

IMO C
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VP
Joined: 17 Jun 2008
Posts: 1373
Re: DS bill [#permalink]

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07 Aug 2008, 16:26
spriya wrote:
x2suresh wrote:
15. 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.

(1) indicates Sue's dist = 10 KM no mention of bill dist.but speed of both are said equal.-> INSUFFI
(2)speed of sue is =64km/h does not give bill's dist -> INSUFFI

(1) and (2) => indicate sue's time =10/64 and hence bill's time=3*10/64 hrs
also speed of two equal =64km/h

hence bill's time,speed known dist can be evaluated.... SUFFI

IMO C

oops not again .. Can someone give me tips to stop making such basic and sily mistakes in quant.
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Its Now Or Never

SVP
Joined: 07 Nov 2007
Posts: 1789
Location: New York
Re: DS bill [#permalink]

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08 Aug 2008, 08:20
abhijit_sen wrote:
Statement 1:
(1) This tells us Bill's speed and Sue' speed is same. It also tells us Sue drove 10 KM. So Bill drove 3*10 = 30 KM. So answer is A or D.

(2) This tells us Sue's speed was 64 KMPH. But no relation ship is given to Bill's speed, so this is insufficient.

You are right.

OA is A.
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Re: DS bill   [#permalink] 08 Aug 2008, 08:20
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# On a certain day it took Bill three times as long to drive

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