Odpowiedzi

2010-04-06T18:20:57+02:00
P = 2ac + 2bc + 2ab
P= 2*12*5+2*12*20+2*20*5=2440200[cm²]

V= a*b*c
V= 12*5*20=1200[cm³]
2010-04-06T18:23:09+02:00
Pc=2*Pp+Pb
Pp=2*240=480cm2
Pb=2*5*12+2*12*5=120+200=320cm2
Pc=480+320=600cm2

V=1200cm3