[tex]volume \: limas= \frac{1}{3} \times la\times t l\\ \\ 5.200 \: {dm}^{3} = \frac{1}{3} \times la \times 39 \: dm \\ \\ 5.200 \: {dm}^{3} = la \times 13 \: dm \\ \\ \frac{5.200 \: {dm}^{3} }{13 \: dm} = la \\ \\ la = 400 \: {dm}^{2} [/tex]
V = 1/3(L(T)
5.200 = 1/3(L(39)
5.200 = 1/3(39(L)
5.200 = 39/3L
5.200 = 13L
13L = 5.200
L = 5.200/13
L = 400/1
L = 400 DM²
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[tex]volume \: limas= \frac{1}{3} \times la\times t l\\ \\ 5.200 \: {dm}^{3} = \frac{1}{3} \times la \times 39 \: dm \\ \\ 5.200 \: {dm}^{3} = la \times 13 \: dm \\ \\ \frac{5.200 \: {dm}^{3} }{13 \: dm} = la \\ \\ la = 400 \: {dm}^{2} [/tex]
V = 1/3(L(T)
5.200 = 1/3(L(39)
5.200 = 1/3(39(L)
5.200 = 39/3L
5.200 = 13L
13L = 5.200
L = 5.200/13
L = 400/1
L = 400 DM²