find the radius of a sphere whose surface area is 49π sq cm
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radius=r
surface area=49π
4πr^2=49π
r^2=49/4
r=√49/4
r=7/2 or 3.5 cm
surface area=49π
4πr^2=49π
r^2=49/4
r=√49/4
r=7/2 or 3.5 cm
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