Resposta:
[tex]\textsf{Leia abaixo}[/tex]
Explicação passo a passo:
[tex]\mathsf{a = \dfrac{L}{2} \iff L = 2a \iff L = 2(10)\iff L = 20\:cm}[/tex]
[tex]\mathsf{A_B = L^2 = (20)^2 = 400\:cm^2}[/tex]
[tex]\mathsf{V = \dfrac{1}{3}\:.\:A_B\:.\:h}[/tex]
[tex]\mathsf{3.200 = \dfrac{1}{3}\:.\:400\:.\:h}[/tex]
[tex]\mathsf{h = \dfrac{9.600}{400}}[/tex]
[tex]\boxed{\boxed{\mathsf{h = 24\:cm}}}[/tex]
