1.

The span of the bridge is said to be economical when

A. the cost of supporting system of one span is equal to cost of one pier.
B. the cost of supporting system of one span is equal to cost of one abutment.
C. the cost of pier is equal to half the cost of abutment.
D. the cost of supporting system of one span is equal to half the cost of pier
Answer» B. the cost of supporting system of one span is equal to cost of one abutment.


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