Alexandragurule18
25.04.2020 •
Mathematics
Josiah has a mass of 75\text{ kg}75 kg75, start text, space, k, g, end text and wants to know how many helium-filled balloons it would take to fly. The density of helium is about 1\text{ kg/m}^31 kg/m 3 1, start text, space, k, g, slash, m, end text, cubed less than regular air, which means a cubic meter of helium can lift about 1\text{ kg}1 kg1, start text, space, k, g, end text. Fully inflated, a balloon has a diameter of 0.3\text{ m}0.3 m0, point, 3, start text, space, m, end text and can be modeled as a sphere. He neglects the mass of the balloon in his calculations. About how many balloons would it take to lift Josiah?
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