直徑為20 ft的半圓形交通隧道,行車道在隧道中央,寬12 ft.要求過往車輛距隧道頂部最近處不能少于1 ft,下列多高的車應(yīng)該被禁止通行?
應(yīng)該是限高7.2ft
選CDE
求翻譯GRE數(shù)學(xué)題
求翻譯GRE數(shù)學(xué)題
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 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. 5ft
B. 7ft
C. 8 ft
D. 9ft
E. 10 ft
圖就是一個半圓,上面標出直徑為20ft
我現(xiàn)在看不懂題目.不知道說什么意思.求教高人
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 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. 5ft
B. 7ft
C. 8 ft
D. 9ft
E. 10 ft
圖就是一個半圓,上面標出直徑為20ft
我現(xiàn)在看不懂題目.不知道說什么意思.求教高人
英語人氣：961 ℃時間：2020-03-26 07:17:44
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