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How far in kilometers can Scott drive into the country if he

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Joined: 20 Feb 2017
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How far in kilometers can Scott drive into the country if he [#permalink] New post 23 Mar 2020, 00:10
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Question Stats:

63% (00:47) correct 36% (00:46) wrong based on 11 sessions
How far in kilometers can Scott drive into the country if he drives out at 40 kilometers per hour (kph), returns over the same road at 30 kph, and spends 8 hours away from home, including a 1-hour stop for lunch?

(A) 105
(B) 120
(C) 145
(D) 180
(E) 210
[Reveal] Spoiler: OA
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Re: How far in kilometers can Scott drive into the country if he [#permalink] New post 06 Oct 2020, 15:36
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Let the distance travelled by scott to town equal "d" and time he spent driving to town equal "t".
since scott used the same routes, the distance he travelled to town equals the distance he travelled back home.
The following equations can therefore be related:

1) d=40t distance travelled to town
2) d=30(7-t) distance travelled back home

40t=30x7-30t
t=3hrs

therefore d=40x3=120km
Answer is B
Re: How far in kilometers can Scott drive into the country if he   [#permalink] 06 Oct 2020, 15:36
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How far in kilometers can Scott drive into the country if he

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