Odpowiedzi

2010-03-26T18:37:12+01:00
A=3,5cm
Pc=2Pp+4Pb
Pb=a*H
Pc=108,5dm²
Pp=a²
Pp=3,5²=12,25 [dm²]

108,5=2*12,25+4*3,5*H
108,5=24,5+14H /-24,5
14H=84 /:14
H=6 [dm]
1 5 1
2010-03-26T18:38:55+01:00
Pc=2Pp+Pb
Pc=108,5 dm²
Pp=a²
Pb=4ah
a=3,5 dm

Pp=3,5²
Pp=12,25 dm²

108,5=2*12,25+4*3,5*h
108,5=24,5+14h
14h=108,5-24,5
14h=84
h=6 dm