求解高人！！题目看不懂

Jolie881209 · 发表于 2010-11-3 21:50:28

GWD2
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
Answer: b

Jolie881209 · 发表于 2010-11-3 21:52:12

图就是个半圆，直径是20ft

精灵宝宝 · 发表于 2010-11-3 21:59:18

是不是等于7½ ft呀？
10^2-6^2-1/2

Jolie881209 · 发表于 2010-11-3 22:23:49

能翻译下吗，

求解高人！！题目看不懂

所属分类: GMAT考试

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