CPM Homework Help : GC Problem 11-79

Multiple Choice: The volume of a solid is $V$ . If the solid is enlarged proportionally so that its side lengths increase by a factor of $9$ , what is the volume of the enlarged solid?

$9V$

$\frac { 81 } { 4 }V$

$81V$

$729V$

Hint:

The volume increases at a size equal to the scale factor of the side lengths cubed.

Answer: