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3 : 19
x : 76cm
(76cm)(3)/19 = 228cm/9 = 12cm
La respuesta es a)12
La menor mide = m
Razón = 3 a 19
Resolvemos :
3/19 = m/76
3 (76) = 19 (m)
228 = 19m
228/19 = m
12 = m
m = 12
Solución : La menor mide = 12 cm
Es la opción a)