Răspuns:
1 zi ................0,75cm
x.....................1200cm(am transformat metri in cm)
x=1200×1/0,75
x=1600 zile
Copacul ajunge la inaltimea de 12m(1200cm)in 1600zile.
1200cm...........1600zile
x........................30zile
x=1200×30/1600
x=22,5cm
Dupa 30 zile,copacul ajunge la o inaltime de 22,5cm.