La longitud de un soporte superior común para un techo con una luz de de 30' (9.1 m) y una flecha de 10' (3 m) es _____.
a. 15'-3'' (464 cm)
b. 16'-5'' (5 m)
c. 18'-0'' (5.5 m)
d. 22'-6'' (686 cm)
Answer: C
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