选择题
2008 AMC 8 Problem 18: Aardvark Circular Path
Two circles that share the same center have radii 10 meters and 20 meters. An aardvark runs along the path shown, starting at A and ending at K. How many meters does the aardvark run?
A.
10π + 20
B.
10π + 30
C.
10π + 40
D.
20π + 20
E.
20π + 40