Răspuns :
12 m ............ 18 zile
8 m ............ x
↑ ↓ i.p
8/12= 18/x → x= 12*18/8 = 3*18/2 = 54 /2 = 27 zile
8 m ............ x
↑ ↓ i.p
8/12= 18/x → x= 12*18/8 = 3*18/2 = 54 /2 = 27 zile