Răspunsuri

2014-05-01T18:08:58+03:00
A/3=b/4=c/5=k
a=3k
b=4k
c=5k
4*3k+3*4k+6*5k=216
12k+12k+30k=216
54k=216
k=216/54
k=4
a=12
b=16
c=20