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## ds test5 #21

This topic has 4 member replies
dunkin77 Master | Next Rank: 500 Posts
Joined
01 Apr 2007
Posted:
269 messages

#### ds test5 #21

Fri Apr 06, 2007 5:04 pm
Hi,

the answer to the attached question is C). Although we don't need to get exact number, I am curious how to get circumference of the circle??

Thank you!
Attachments

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dunkin77 Master | Next Rank: 500 Posts
Joined
01 Apr 2007
Posted:
269 messages
Sun Apr 08, 2007 7:38 pm
Thank you for patiently explaining all this. I understnd finally

Princeton Review GMAT Instructor
Joined
16 Mar 2007
Posted:
22 messages
Sun Apr 08, 2007 5:01 pm
Well, the arc length that they give us is for major arc XYZ, if I'm reading the problem correctly. Since the angle for minor arc XZ would be 120, then the remaining angle for major arc XYZ would be 240. So 240/360 = 18/Circumference, so the circumference would be 27.

_________________
Matt McIver

Princeton Review Instructor

dunkin77 Master | Next Rank: 500 Posts
Joined
01 Apr 2007
Posted:
269 messages
Sun Apr 08, 2007 7:38 pm
Thank you for patiently explaining all this. I understnd finally

Princeton Review GMAT Instructor
Joined
16 Mar 2007
Posted:
22 messages
Sun Apr 08, 2007 5:01 pm
Well, the arc length that they give us is for major arc XYZ, if I'm reading the problem correctly. Since the angle for minor arc XZ would be 120, then the remaining angle for major arc XYZ would be 240. So 240/360 = 18/Circumference, so the circumference would be 27.

_________________
Matt McIver

Princeton Review Instructor

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