Posted by **Winsel** on Saturday, August 14, 2010 at 1:36am.

A surveyor made two sections of the railroad bridge, both at 210 meters in length. Suppose that the maximum of elevation of each section is 75deg. When the bridge is closed, the water level is normally 13 meters below the bridge.

a. When the bridge is fully opened, what is the distance from the water to point A on the upper left corner of the right section?

b. When the bridge is fully opened, find the distance between the separated ends of the section.

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