Si se construye una escalera con una altura total de 7'-7" (2.10 m - 17.80 cm), la cantidad de contrahuellas necesarias y la altura de la contrahuella es de_____
a. 11 contrahuellas, cada
una de 71
/2" (19.05 cm) de
alto
b. 12 contrahuellas, cada
una de 7" (17.80 cm) de
alto
c. 13 contrahuellas, cada
una de 7" (17.80 cm) de
alto
d. 14 contrahuellas, cada
una de 71
/4" (18.40 cm) de
alto
Answer: C
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