Asked by Anonymous

A spherical water balloon is being filled with water at the rate of 125 cubic inches per minute. At what rate is the radius increasing when the radius is 10 inches? At what rate is the surface area increasing?
Answered by Steve
v = 4π/3 r^3
dv/dt = 4πr^2 dr/dt

Now just plug in your numbers.
Answered by ChrismB
and for rate of surface area increasing?
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