Question 146012
Call the width {{{x}}} and the length {{{3x}}}
The perimeter, {{{P = 3x + 3x + x + x}}}
{{{P = 192}}}
{{{192 = 8x}}}
{{{x = 24}}}
The dimensions are {{{x}}} by {{{3x}}} = {{{24}}} by {{{72}}} answer