Odpowiedzi

2010-04-08T21:28:34+02:00
L=10cm, r=7cm a więc Pb=πrl=π*10*7=70πcm²
2010-04-08T21:29:07+02:00

l = 10cm
r = 7cm
Pb = π*r*l
Pb = π*7*10
Pb = 70π cm²