Question 192042
If each edge is a:
surface area = 6a^2
Volume = a^3
The rate of change of the volume = 3a^2
That's 1/2 of the surface area.
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A number is given for the rate of change, 0.2 cm/sec, but no value for the length of the side, so a numerical answer is not possible.
The answer doesn't match any of the choices.  I suspect something is wrong.