Răspunsuri

2014-05-27T18:33:28+03:00
lungimea de 50 mm 
inaltimea 0.015 m=150mm
latimea de 0.3dm=30 mm

V=L xlxh => V= 50 x 150x30= 1500 x 150= 225000 mm³
At=  2(Ll+Lh+lh)=>2(50x30+50x150+30x150) = 2(1500+7500+4500)=>2x13500= 27000mm²