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If i am currently 20 years old and my sister is half my age, how old will my sister be when i'm 30

Solution

If i am currently 20 years old and my sister is half my age, how old will my sister be when i'm 30

Solution

Siste r^{'} s age in 30 years : 40

Plug in to find h o w o l d w i ll m y s i s t er b e w h e n i^{'} m 30

Solution steps

me : 20

Sister : \frac{1}{2} \cdot 20

\frac{1}{2} \cdot 20 + 30 = 40

Siste r^{'} s age in 30 years : 40

Plug in to find h o w o l d w i ll m y s i s t er b e w h e n i^{'} m 30

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