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Between 3:00 am and 3:00 pm of the same day, the minute hand of a properly operating clock...

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by BTGmoderatorLU » Mon Jun 22, 2020 12:51 pm

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Source: GMAT Paper Tests
Clock_Problem.JPG
Between 3:00 am and 3:00 pm 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

The OA is D
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Source: — Problem Solving |

BTGmoderatorLU wrote:
Mon Jun 22, 2020 12:51 pm
Source: GMAT Paper Tests

Clock_Problem.JPG

Between 3:00 am and 3:00 pm 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

The OA is D
Between 3:00 am and 3:00 pm of the same day, the minute hand would make 12 complete revolutions, with each revolution is of 360º. Thus, the required degree = 12*360 = 4,320º

Correct answer: D

Hope this helps!

-Jay
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BTGmoderatorLU wrote:
Mon Jun 22, 2020 12:51 pm
Source: GMAT Paper Tests

Clock_Problem.JPG

Between 3:00 am and 3:00 pm 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

The OA is D
Solution:

The minute hand makes a complete turn every hour. Since each complete turn is 360 degrees and there are 12 hours between 3 am and 3 pm, the total number of degrees is 360 x 12 = 4,320.

Answer: D

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