Calculate Balloon Volume from Helium Mass: 199 kg

AI Thread Summary
To calculate the volume of a balloon filled with 199 kg of helium, the user seeks a formula that does not require the balloon's radius. They note that each cubic foot of helium can lift 0.069 lbs, prompting a conversion of 199 kg to pounds for further calculations. The user considers dividing the weight in pounds by 0.069 to find the volume but is unsure about the accuracy of this method. Additionally, they mention a density of helium at 0.179, suggesting a potential calculation involving this density. The discussion revolves around finding the correct approach to determine the balloon's volume based on the mass of helium.
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The total mass of helium in a balloon is 199 kg. What is the volume of the balloon? Enter only the numeric portion of the answer, not the units.

That is the problem. I am having trouble locating a simple forumla for this. All I can seem to find involve having the radius of the balloon which I do not have. In the book it says each cubic foot of helium can lift .069 lb, so this may play a factor but I am unsure of how exactly. I have thought about converting 199KG to lbs and dividing by .069. Is this thinking correct?
 
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Helium = 0.179 so maybe I can take 199kg times .179 and that 35.621 kg is this correct?
 

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