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Between 3:00 am. and 3:00 p.m. of the same day, the minute

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Intern
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Joined: 20 May 2008
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Between 3:00 am. and 3:00 p.m. of the same day, the minute [#permalink] New post 30 May 2008, 10:28
2. Between 3:00 am. and 3:00 p.m. of the same day, the
minute hand of a properly operating clock, indicated by the
figure above, will turn through how many degrees?
(A) 0
(B) 1,200
(C) 2,160
(D) 4,320
(E) 8,640

I cant get a grip on the concept. The OA is D..need my concept cleared. it so confusing.
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Re: Another one [#permalink] New post 30 May 2008, 10:32
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sportypk wrote:
2. Between 3:00 am. and 3:00 p.m. of the same day, the
minute hand of a properly operating clock, indicated by the
figure above, will turn through how many degrees?
(A) 0
(B) 1,200
(C) 2,160
(D) 4,320
(E) 8,640

I cant get a grip on the concept. The OA is D..need my concept cleared. it so confusing.


Let me try and explain.
Between 3.00 am and 3.00 pm, we have 12 hours.
For every hour that has passed,the minute hand has to go full circle once.
ie it sweeps 360 degrees every hour.
So for 12 hours,it'll cover 360*12 =4320

Hence,D.
Hope that helps.. shoot questions, if any

Cheers !
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Senior Manager
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Re: Another one [#permalink] New post 30 May 2008, 12:06
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oh k here is the answer
in an hour the clock hand will move 360 degree
in 12 hours it will move 12 * 360 = 4,320

HTH
_________________

The world is continuous, but the mind is discrete

Re: Another one   [#permalink] 30 May 2008, 12:06
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