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First find the radius by dividing 19 by 2*pi which is 3.023943919 cm

Surface area of a sphere (the ball) = 4*pi*radius2

Surface area = 4*pi*3.0239439192 => 114.9098689

Surface area of the ball: 115 square centimeters correct to three significant figures.

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Q: The circumference of a hollow ball is 19cmwhat is the surface area?
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