## Beautiful_Lier96 2 years ago to find the volume of a balloon how am i suppost to find the radius ? i know it says find the circumference of the balloon first but im totally confused. is it supposed to be in inches.

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1. JFraser

If you assume the balloon is "perfectly" spherical, the circumference will be equal to $C = 2 \pi r$ rearrange and solve for r, but do it in cm, not inches.