Question 936658
For a rectangle, the perimeter is,
{{{P=2(L+W)}}}
{{{2(L+W)=28}}}
{{{L+W=14}}}
The volume of a rectangular solid is,
{{{V=L*W*5}}}
{{{V=5WL}}}
From the perimeter equation,
{{{L=14-W}}}
Substitute,
{{{V=5W(14-W)}}}
{{{V=70W-W^2}}}