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# The Figure Below shows the beams from a beacon with two

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Director
Joined: 14 Oct 2003
Posts: 583
Location: On Vacation at My Crawford, Texas Ranch
The Figure Below shows the beams from a beacon with two [#permalink]

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30 Dec 2003, 22:00
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

The Figure Below shows the beams from a beacon with two search lights, one red and one green, which rotate at the same rate. If the red light rotates in a clockwise direction and the gree light rotates in a counterclockwise direction, what is the number of degrees through which each light must rotate before the red beam and green beam are aligned a second time?

a) 180* + w

b) 180* - w/2

c) 360* - w/2

d) (180* + w)/2

e) (360* + w)/2

*From Cambridge Test Prep
Attachments

BEACOn.JPG [ 8.64 KiB | Viewed 699 times ]

CEO
Joined: 15 Aug 2003
Posts: 3454

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30 Dec 2003, 22:15
Titleist wrote:
The Figure Below shows the beams from a beacon with two search lights, one red and one green, which rotate at the same rate. If the red light rotates in a clockwise direction and the gree light rotates in a counterclockwise direction, what is the number of degrees through which each light must rotate before the red beam and green beam are aligned a second time?

a) 180* + w

b) 180* - w/2

c) 360* - w/2

d) (180* + w)/2

e) (360* + w)/2

*From Cambridge Test Prep

first alignment : w/2

second alignment : 180

total : 180 +w/2

Director
Joined: 28 Oct 2003
Posts: 501
Location: 55405

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30 Dec 2003, 22:22
Agree with Praetorian.

Questions like these can be a doozy, even when they're relatively straightforward,
Director
Joined: 14 Oct 2003
Posts: 583
Location: On Vacation at My Crawford, Texas Ranch

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30 Dec 2003, 22:24
Bunch of smart dudes we have on this board!
30 Dec 2003, 22:24
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