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M21#27

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Senior Manager
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Joined: 29 Sep 2009
Posts: 396
Location: Ann Arbor, MI
Schools: ROSS PT 2012
WE 1: Mech Engineer - General Electric - 2yrs
WE 2: Lead Mech Engineer - Ingersoll Rand - 4 yrs
Followers: 2

Kudos [?]: 23 [0], given: 5

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M21#27 [#permalink] New post 16 Oct 2010, 11:20
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Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Between 10:06 and 12:30 the hour hand of the clock turns by

(C) 2008 GMAT Club - m21#27

* 66 degrees
* 70 degrees
* 72 degrees
* 75 degrees
* 78 degrees
12 hours = 360 degrees (Corrected)
1 hr = 15 degs
2hrs = 30 degs
24/60 or 2/5 hrs = (2*15)/5 = 6 degs
Total angular displacement: 30 + 6 = 36 degrees.

Last edited by vicksikand on 16 Oct 2010, 14:16, edited 1 time in total.
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Re: M21#27 [#permalink] New post 16 Oct 2010, 12:19
vicksikand wrote:
Between 10:06 and 12:30 the hour hand of the clock turns by

(C) 2008 GMAT Club - m21#27

* 66 degrees
* 70 degrees
* 72 degrees
* 75 degrees
* 78 degrees
12 hours = 180 degrees
1 hr = 15 degs
2hrs = 30 degs
24/60 or 2/5 hrs = (2*15)/5 = 6 degs
Total angular displacement: 30 + 6 = 36 degrees.


12 hours = 360 degrees
So 2hrs = 60 degrees
24mins = 24/60*30 = 12 degrees

So 72 degrees
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Senior Manager
Senior Manager
User avatar
Joined: 29 Sep 2009
Posts: 396
Location: Ann Arbor, MI
Schools: ROSS PT 2012
WE 1: Mech Engineer - General Electric - 2yrs
WE 2: Lead Mech Engineer - Ingersoll Rand - 4 yrs
Followers: 2

Kudos [?]: 23 [0], given: 5

GMAT Tests User
Re: M21#27 [#permalink] New post 16 Oct 2010, 14:15
shrouded1 wrote:
vicksikand wrote:
Between 10:06 and 12:30 the hour hand of the clock turns by

(C) 2008 GMAT Club - m21#27

* 66 degrees
* 70 degrees
* 72 degrees
* 75 degrees
* 78 degrees
12 hours = 180 degrees
1 hr = 15 degs
2hrs = 30 degs
24/60 or 2/5 hrs = (2*15)/5 = 6 degs
Total angular displacement: 30 + 6 = 36 degrees.


12 hours = 360 degrees
So 2hrs = 60 degrees
24mins = 24/60*30 = 12 degrees

So 72 degrees

I dont believe it I messed up on that - 12 hrs = 360 degrees. Now thats a major oops!
Re: M21#27   [#permalink] 16 Oct 2010, 14:15
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M21#27

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