Odpowiedzi

2010-03-02T20:31:44+01:00
Pc= Pp + Pb

Pp= 2*a*b
Pb= (2* a*h) + (2* b*h)=

Pc=280 cm²

Pp=2*6*5
Pp=60 cm²

Pb= Pc- Pp
Pb= 280-60= 220 cm²

220 = (2* a*h) + (2* b*h)
220 = (2* 6*h) + (2* 5*h)
220 = 12h+ 10h
220 = 22h/22
h=10 cm