Răspuns:
Explicație pas cu pas:
5)
a+r=636
r=a/2+24⇒ 2r=a+48 ⇒ a=2r-48⇔ 2r-48+r=636 ⇔ 3r=684 ⇔
r=228 ⇒ a=2×228-48=456-48=408
Trandafiri albi=408; Trandafiri rosii=228
6)
In cos 48 portocale
Nr pungi:48-3=45 port:5port/punga=9 pungi
7) l=12 cm
L=3l=3×12=36 cm
P=2(12+36)=2×48=96 cm