Question 830863
Given:{{{ L = 3W }}}
Perimeter = {{{ 2W + 2L }}}
By substitution:
Perimeter = {{{ 2W + 2*3W }}}
Perimeter = {{{ 8W }}}
{{{ 100 = 8W }}}
{{{ W = 12.5 }}}
and
{{{ L = 3W }}}
{{{ L = 3*12.5 }}}
{{{ L = 37.5 }}}
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The width is 12.5 ft
check:
{{{ 100 = 2*12.5 + 2*37.5 }}}
{{{ 100 = 25 + 75 }}}
{{{ 100 = 100 }}}
OK