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# Approximately what is the total stopping distance, in feet,

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Approximately what is the total stopping distance, in feet, [#permalink]  19 Jan 2016, 08:37
Expert's post
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Question Stats:

76% (00:41) correct 23% (00:57) wrong based on 13 sessions
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#GREpracticequestion Approximately what is the total stopping distance, in feet.jpg [ 154.54 KiB | Viewed 598 times ]

Note: Total stopping distance is the sum of the distance traveled during reaction time and the distance traveled after brakes have been applied.

Approximately what is the total stopping distance, in feet, if the car is traveling at a speed of 40 miles per hour when the driver is signaled to stop?

A. 130

B. 110

C. 90

D. 70

E. 40

Practice Questions
Question: 18
Page: 343
Difficulty: medium
[Reveal] Spoiler: OA

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Founder
Joined: 18 Apr 2015
Posts: 6562
Followers: 107

Kudos [?]: 1253 [0], given: 5955

Re: Approximately what is the total stopping distance, in feet, [#permalink]  19 Jan 2016, 08:44
Expert's post
Solution

The total stopping distance is equal to the sum of the distance traveled during reaction time and the distance traveled after the brakes have been applied

ON the left side graph, we do have, accordingly with the instructions provided: 45

ON the right side graph, we do have a rough value of $$75 < X < 90$$

$$X= 80/85$$

$$45 + 80/85 = 125/130$$

The correct answer is $$A$$
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Re: Approximately what is the total stopping distance, in feet,   [#permalink] 19 Jan 2016, 08:44
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