Odpowiedzi

2010-03-03T19:55:48+01:00
L=h+3 z tw. Pitagorasa l²=h²+5² to (h+3)²=h²+25 to h²+6h+9=h²+25 to h=⁸/₃
l=h+3=8/3+3=17/3
P=πr²+πrl≈168cm₂