Задача id16454

A balloon with a volume V = 4000 m3 is filled with helium. The mass of the structure, equipment and crew is M = 3 tons. Helium completely fills the cylinders at a height where the air density pв = 1.2 kg/m3, and the helium density рг = 0.18 kg/m3. Find the largest mass of cargo that the balloon can lift.

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