Question

ayudaaa:( doy corona​

Answer 1

Explicación paso a paso:

$1 \: m \: = \: 10 \: dm \\ \\ 30 \: dm \: ( \frac{1m}{10 \: dm} ) = \: 3 \: m \\ \\ 400 \: cm \: ( \frac{1 \: m}{100 \: cm} ) = \: 4 \: m \\ \\ area \: = \: (largo)(ancho) \\ area \: = \: 4 \: m \: (3 \: m) \\ area \: = \: 12 \: {m}^{2} \\ \\ \\ \\ 1 \: dam \: = \: 10 \: m \\ \\ 0.42 \: dam \: ( \frac{10 \: m}{1 \: dam} ) = 4.2 \: m \\ \\ area \: cuadrado \: = {lado}^{2} \\ area = \:(4.2 \: m)^{2} \\ area \: = \: 17.64 \: {m}^{2}$