Question

Numarul 180 se imparte in parti direct proportionale cu 3,8 si 4. Aflati dimensiunile partilor obtinute.

Answer 1

Notam numerele necunoscute cu a,b si c.
a+b+c=180
a/3=b/8=c/4
a=3b/8 si c=4b/b =>
=> (3b+4b)/8 +b=180=>
=> 7b/8+ 8b/8=180=> 15b=180*8=> b=96
a=3*96/8=3*12=36
c=180-36-96=48