Father and daughter

Father is 36 years old, daughter is 20 years less. What will be the ratio between them when they are 10 years more?


x =  23:13


f=36 d=f20=3620=16  x=f+10d+10=36+1016+1023131.76921.769223:13f=36 \ \\ d=f-20=36-20=16 \ \\ \ \\ x=\dfrac{ f+10 }{ d+10 }=\dfrac{ 36+10 }{ 16+10 } \doteq \dfrac{ 23 }{ 13 } \doteq 1.7692≈ 1.7692 \doteq 23:13

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