Thames Tunnel The oldest underwater tunnel in the world. (0.4 km) (1825 - 1843). Severn Tunnel One of the oldest underwater tunnels in the world (3.62 km) (1873 - 1886). Chesapeake Bay Bridge Tunnel (23 miles (37 km)), connecting Virginia Beach with the Eastern Shore of Virginia (1960 - 1964).
Business Productivity is the ability of an organization to utilize its available resources in order to produce profitable goods or services as desired by customers or clients. It is the productivity that measures the performance of an organization...
For example, a certain equipment can produce 10 tons of output per hour. 1  Economic productivity is the value of output obtained with one unit of input. For example, if a worker produces in an hour an output of 2 units, whose price is 10$ each, then his productivity is 20$.