Question

If the radius of a sphere is doubled, then what is the increase in percentage
of the surface area of the sphere?
3

Answer 1

Answer:

300%

Explanation:

If r is the radius of a sphere its surface area = 4(pi)r^2. If the radius is doubled then its surface area = 4(pi)(2r)^2 = 4*4(pi)r^2. So the surface area becomes 4-fold or the increase in surface area is 300%.