Question

Si un tren recorre 80km en 1 1/2 hora cuanto recorre en 3 1/4

Answer 1

1 1/2 = 2/2 + 1/2 = 3/2
3 1/4 = 12/4 + 1/4 = 13/4

Por regla de tres:
80 km son a 3/2 horas
T kms son a 13/4 horas

T = (80*13/4) / (3/2)
T = (1040/4) / (3/2)
T = (1040*2) / (4*3)
T = 2080/12
T = 520/3
520/3 = (519/3) + (1/3) = 173 1/3

El tren recorrerá
173 1/3 kms