5m=80s
m=80/5
m=16
9m=?
9(16)=
144 soles
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5m=80s
m=80/5
m=16
9m=?
9(16)=
144 soles
9m...........X
X= (9×80)÷5
X= 720÷5
X= 144 soles
Rpta: los 9 metros costará 144 soles