Si cada soporte superior común (incluido el extremo saliente) de un techo a dos aguas tiene 14' (4.2 m) de largo, cuántos maderos de 16' (4.8 m) se necesitan para formar los soportes superiores comunes de una vivienda de 30' (9.1 m) de largo sin salientes, construida con una separación de 24" (61 cm) entre los centros?
a. 32
b. 30
c. 28
d. 42
Answer: A
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