Răspuns :
l = 75 * 4/5 = 60 m
P = 2 * 75 + 2 * 60
P = 150 + 120
P = 270 m
270 : 5 = 54 plopi
P = 2 * 75 + 2 * 60
P = 150 + 120
P = 270 m
270 : 5 = 54 plopi
l = 75 * 4/5 = 60 m
P = 2 * 75 + 2 * 60
P = 150 + 120
P = 270 m
270 : 5 = 54 plopi