Question

aflati aria volumul si perimetrul cubului cu latura de 5 2 10 cm

Answer 1

pai cu 5cm este : A=25, V=25cm*2, P=20
           2cm este : A=4  , V=4cm*2  , P=8
           10cm este : A=100 , V-100cm*2 , P=40

Answer 2

$1)l = 5 \: cm$

$A_{b} = {l}^{2} = {5}^{2} = 25 \: {cm}^{2}$

$A_{l} = 4 {l}^{2} = 4 \times {5}^{2} = 4 \times 25 = 100 \: {cm}^{2}$

$A_{t} = 6 {l}^{2} = 6 \times {5}^{2} = 6 \times 25 = 150 \: {cm}^{2}$

$V = {l}^{3} = {5}^{3} = 125 \: {cm}^{3}$

$P = 12l = 12 \times 5 = 60 \: cm$

$2)l = 2 \: cm$

$A_{b} = {l}^{2} = {2}^{2} = 4 \: {cm}^{2}$

$A_{l} = 4 {l}^{2} = 4 \times {2}^{2} = 4 \times 4 = 16 \: {cm}^{2}$

$A_{t} = 6 {l}^{2} = 6 \times {2}^{2} = 6 \times 4 = 24 \: {cm}^{2}$

$V = {l}^{3} = {2}^{3} = 8 \: {cm}^{3}$

$P = 12l = 12 \times 2 = 24 \: cm$

$3)l = 10 \: cm$

$A_{b} = {l}^{2} = {10}^{2} = 100 \: {cm}^{2}$

$A_{l} = 4 {l}^{2} = 4 \times {10}^{2} = 4 \times 100 = 400 \: {cm}^{2}$

$A_{t} = 6 {l}^{2} = 6 \times {10}^{2} = 6 \times 100 = 600 \: {cm}^{2}$

$V = {l}^{3} = {10}^{3} = 1000 \: {cm}^{3}$

$P = 12l = 12 \times 10 = 120 \: cm$