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If the surface area of a sphere is increased by a factor of 4 what is the change in the length of the radius of the sphere?
Wiki User
∙ 14y ago
The area of a sphere is A=4*3.14 * r^2. Thus the area varies as the square of the radius. If the surface area is increased by a factor of 4, then the radius will have to increase by the square root of 4 which is 2.
Wiki User
∙ 14y ago
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