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# Two cars start at the same point and time and travel in opposite direc

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Math Expert
Joined: 02 Sep 2009
Posts: 64167
Two cars start at the same point and time and travel in opposite direc  [#permalink]

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31 Jul 2019, 07:50
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5% (low)

Question Stats:

94% (00:42) correct 6% (01:35) wrong based on 53 sessions

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Two cars start at the same point and time and travel in opposite directions. If one cars travelsat 45 km per hour and the other at 60 km per hour, how many hours will pass before they are 210 km apart ?

A. 1
B. 1.5
C. 2
D. 2.5
E. 5

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Re: Two cars start at the same point and time and travel in opposite direc  [#permalink]

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31 Jul 2019, 07:55
Bunuel wrote:
Two cars start at the same point and time and travel in opposite directions. If one cars travelsat 45 km per hour and the other at 60 km per hour, how many hours will pass before they are 210 km apart ?

A. 1
B. 1.5
C. 2
D. 2.5
E. 5

In one hour they are covering 105km. In 2 hours they will cover 210km.
Hence C.
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Re: Two cars start at the same point and time and travel in opposite direc  [#permalink]

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31 Jul 2019, 08:01
Let t be the time travelled.

45t+60t=210
105t=210
t=2hrs

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Re: Two cars start at the same point and time and travel in opposite direc  [#permalink]

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05 Aug 2019, 16:15
Bunuel wrote:
Two cars start at the same point and time and travel in opposite directions. If one cars travelsat 45 km per hour and the other at 60 km per hour, how many hours will pass before they are 210 km apart ?

A. 1
B. 1.5
C. 2
D. 2.5
E. 5

We can create the distance equation to solve for t:

45t + 60t = 210

105t = 210

t = 2

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Re: Two cars start at the same point and time and travel in opposite direc   [#permalink] 05 Aug 2019, 16:15

# Two cars start at the same point and time and travel in opposite direc

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