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Helium is escaping from a spherical balloon at the rate of 2 cm3/min. When the surface area is shrinking at the rate of 1/3 cm2/min.,

Helium is escaping from a spherical balloon at the rate of 2 cm3/min. When the surface area is shrinking at the rate of 1/3 cm2/min., find the radius of the spherical balloon.

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