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Two cars start off at the same point on a straight highway; [#permalink]
21 Mar 2013, 14:01

00:00

A

B

C

D

E

Difficulty:

65% (hard)

Question Stats:

15% (02:39) correct
85% (01:07) wrong based on 13 sessions

Two cars start off at the same point on a straight highway; each car travels in opposite direction to the other for 6km, and then takes an 8km travel after turning to the right. What is the shortest and longest distances that exist between them?

More:"All I wish someone had told me about GMAT beforehand" There are many things you want to know before doing the GMAT exam (how is exam day, what to expect, how to think, to do's...), and you have them in this blog, in a simple way

Re: Two cars start off at the same point on a straight highway; [#permalink]
21 Mar 2013, 17:10

2

This post received KUDOS

Kindly check the answer. It should be C.

The shortest distance will be along the hypotenuse and longest distance will be along the path taken by the two cars, i.e. along the other two sides of the triangles. Image is attached.

Re: Two cars start off at the same point on a straight highway; [#permalink]
21 Mar 2013, 23:02

Expert's post

Abhii46 wrote:

Kindly check the answer. It should be C.

The shortest distance will be along the hypotenuse and longest distance will be along the path taken by the two cars, i.e. along the other two sides of the triangles. Image is attached.

Please give a kudo if you like my post.

Pythagoras strikes again! Of course this is setting us up to have a right angle triangle, and a 3-4-5 (all values x2) triangle at that. The shortest distance will have to be 20 (10x2), but the longest distance is where this question falls apart. I'd say the longest distance between them is the path starting at point A, passing by Siberia, and then hitting point B.

This question sort of falls apart here but the shortest distance is nevertheless measurable and the longest distance can be measured with enough arbitrary rules (using only the roads that are used and not being able to take the same road twice, sort of thing). Using these completely realistic restrictions, the answer is C.

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