GMAT2-6

[Martina]

Q6
The figure above shows the dimensions of a semicircular cross section of a one-way tunnel. The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel. If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?

A. 5½ ft
B. 7½ ft
C. 8 ½ ft
D. 9½ ft
E. 10 ft

ANS: B

不了解句意. 請大家幫幫忙嚕 !! (圖片沒辦法弄下來 不好意思)

[micht]

這題夫子有解說過

http://www.formosamba.com/phpBB3/viewtopic.php?t=1732