The circumference of the circle is 18pi. We need to determine what fraction of the circumference is arc PQ. The proportionality of circles tells us that:
(degree measurement of arc)/360 = (length of arc)/circumference
The attached drawing shows that the degree measurement of arc PQ is 40 degrees.
40/360 = 1/9
1/9 = (PQ)/18pi
PQ = 2pi.
The correct answer is A.
-
Attachments
-
- arc question.pdf
- (58.44 KiB) Downloaded 180 times
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at
[email protected].
Student Review #1
Student Review #2
Student Review #3
