Question 649172

the dimensions of the mat: length {{{L}}} and width {{{W}}}

The perimeter {{{P}}} of the outside of the mat is {{{60in}}}

{{{P=2L+2W}}}....=>...{{{2(L+W)=60in}}}..=>...{{{(L+W)=30in}}}

{{{L+W=30in}}}....1

the mat is THREE TIMES as wide at the top and bottom as it is at the sides

{{{L=3W}}}................2...plug it in equation 1

{{{L+W=30in}}}....1

{{{3W+W=30in}}}

{{{4W=30in}}}

{{{W=30in/4}}}

{{{highlight(W=7.5in)}}}

now find 

{{{L=3W}}}................2

{{{L=3*7.5in}}}

{{{L=highlight(22.5in)}}}