Odpowiedzi

2010-04-08T22:37:31+02:00
V = 1/3a²H
1/3a²H = 16/3 cm³
H = 2a
1/3*a²*2a = 16/3
2/3a³ = 16/3 |:2/3
a³ = 8
a = ∛8
a = 2
Pc = a²+4*1/2a*Hb
obliczam Hb
Hb² = H²+(1/2a)²
Hb² = (2a)²+1²
Hb² = 4²+1
Hb² = 16+1
Hb = √17
Pc = 2²+4*1/2*2*√17
Pc = 4+4√17
Pc = 4(1+√17) cm²