Răspuns:
Explicație pas cu pas:
P patratului = 4 x L patrat
L = 2R = H
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a)
L patrat = P : 4 = 24 : 4 = 6 cm
R = 6 : 2 = 3 cm
H = 6 cm
Ab = πR^2 = 9π cm^2
Al = 2πRH = 2*π*3*6 = 36π cm^2
At = 2Ab + Al = 18π + 36π = 54π cm^2
V = πR^2H = π*9*6 = 54π cm^3
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b)
A = L^2 = 64 cm^2
L = 8 cm
R = 4 cm
H = 8 cm
Ab = πR^2 = 16π cm^2
Al = 2πRH = 2*π*4*8 = 64π cm^2
At = 2Ab + Al = 32π + 64π = 96π cm^2
V = πR^2H = π*16*8 = 128π cm^3