[tex] \frac{21}{100} \times m \: aer = 710000g \\ m \: aer = 710000 \times \frac{100}{21} \\ m \: aer = \frac{71 \times {10}^{6} }{21} \\ m \: aer= 3.380952\times {10}^{6} [/tex]
[tex]densitatea \: aer = \frac{m \: aer}{v \: aer} \\v \: aer = \frac{m \: aer}{densitatea \: aer} \\ v \: aer = \frac{ 3.380952\times {10}^{6} }{1.42} \\ v \: aer= 2.380952 \times {10}^{6} \\ v \: aer = 2380952[/tex]
