Question 1082911
Start with the surface area of a sphere,
{{{A=4pi*R^2}}}
Differentiate with respect to time,
{{{dA/dt=(4pi)2R*(dR/dt)}}}
Substituting,
{{{1=(4pi)(2(3))(dR/dt)}}}
{{{dR/dt=1/(24pi)}}}{{{in/s}}}
The units of the change of radius are inches per second. 
The volume change is in units of cubic inches/second.