Thursday, January 5, 2012

the length of the golden gate bridge  1.7 mi (2.7 km) or 8,981 ft (2,737.4 m) 




It is made of steel



250px-GoldenGateBridge-001.jpg











the length of the 



Manhattan Bridge 6,855 ft (2,089 m

            material : unknown











 the length of the Sydney Harbour Bridge
              
           1,149 m (3,770 ft) 


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