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Approximately what is the total stopping distance, in feet,

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Joined: 18 Apr 2015
Posts: 5150
Followers: 77

Kudos [?]: 1030 [0], given: 4640

Approximately what is the total stopping distance, in feet, [#permalink]  19 Jan 2016, 08:37
Expert's post
00:00

Question Stats:

66% (00:44) correct 33% (00:57) wrong based on 9 sessions

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

_________________
Moderator
Joined: 18 Apr 2015
Posts: 5150
Followers: 77

Kudos [?]: 1030 [0], given: 4640

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