In a typical site-cast reinforced-concrete structure, the cost of formwork and shores is

A) approximately 25% of the combined cost of concrete and steel.
B) approximately 50% of the combined cost of concrete and steel.
C) approximately 75% of the combined cost of concrete and steel.
D) approximately equal to the combined cost of concrete and steel.
E) none of the above.


D) approximately equal to the combined cost of concrete and steel.

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