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# Reid took 1 hour to cycle from his home to his college

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Director
Status: No dream is too large, no dreamer is too small
Joined: 14 Jul 2010
Posts: 608

Kudos [?]: 1154 [0], given: 39

Reid took 1 hour to cycle from his home to his college [#permalink]

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27 Jan 2012, 12:28
00:00

Difficulty:

85% (hard)

Question Stats:

42% (02:08) correct 58% (01:59) wrong based on 48 sessions

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Distance.JPG [ 32.16 KiB | Viewed 5693 times ]

Reid took 1 hour to cycle from his home to his college. The graph shows Reed’s distance from his college during That hour. Reid’s average speed for the last 15 minutes Of the hour was how many kifometers per hour greater Than his average speed for the first 45 minutes?

A. 3
B. 4
C. 5
D. 6
E. 7
[Reveal] Spoiler: OA

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Kudos [?]: 1154 [0], given: 39

Math Expert
Joined: 02 Sep 2009
Posts: 42305

Kudos [?]: 133079 [2], given: 12403

Re: Reid took 1 hour to cycle from his home to his college [#permalink]

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28 Jan 2012, 06:22
2
KUDOS
Expert's post
Baten80 wrote:
Attachment:
Distance.JPG

Reid took 1 hour to cycle from his home to his college. The graph shows Reed’s distance from his college during That hour. Reid’s average speed for the last 15 minutes Of the hour was how many kifometers per hour greater Than his average speed for the first 45 minutes?

A. 3
B. 4
C. 5
D. 6
E. 7

There must be something wrong with the image: it's hard to identify which number corresponds to which mark on the graph.

Anyway the solution should be as follows: {average rate for the last 15 minutes}-{average rate for the first 45 minutes}={distance covered in the last 15 minutes}/(1/4)-{distance covered in the first 45 minutes}/(3/4).
_________________

Kudos [?]: 133079 [2], given: 12403

Re: Reid took 1 hour to cycle from his home to his college   [#permalink] 28 Jan 2012, 06:22
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