选择题
2005 AMC 8 Problem 10: Walking and Running
Joe had walked half way from home to school when he realized he was late. He ran the rest of the way to school. He ran 3 times as fast as he walked. Joe took 6 minutes to walk half way to school. How many minutes did it take Joe to get from home to school?
A.
7
B.
7.3
C.
7.7
D.
8
E.
8.3