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What is the maximum total weight (payload, structure, and skin) that a 4000m^3 balloon filled with...

What is the maximum total weight (payload, structure, and skin) that a 4000m^3 balloon filled with Helium (p=0.16 kg/m^3) can support? a.) 6300 N b.) 39200 N c.) 32900 N d.)45500 N PLEASE EXPLAIN

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