4a=suma lungimilor
4b=suma latimilor
4c=suma inaltimilor
4(a+b+c)=180 cm a+b+c=45
b=60%a=3a/5
c=a/5
a+3a/5+a/5=45
5a+3a+a=225
9a=225
a=25 cm
b=3×25/5=15 cm
c=25/5=5 cm
suma celor trei dimensiuni ale cuboidului:
25+15+5=45 cm
Vvas=25×15×5=1875 cm³ =1,875 dm³ =1,875 litri <2litri
deci nu incap 2 litri in acest vas