Odpowiedź:
a) pc = 2pb1 + 2pb2 + 2Pp
pb1 = 2*1,5 dm = 3dm^2
pb2 = 3*1,5 dm = 4,5dm^2
Pp = 2*3dm = 6dm ^2
Pc = 6+9+6=21dm^2
b) pb1 = 2,5 *0,5 = 1,25dm^2
pb2 = 1dm *0,5 = 0,5dm^2
Pp = 2,5 *1=2,5dm^2
Pc = 2,5+1+5=8,5dm^2
c) pb1 = 5*3= 15cm^2
pb2= 2*5 = 10cm^2
Pp = 3*2 = 6cm^2
Pc = 30+20+12 = 62cm^2
