Question 607410
The formula for perimeter is {{{ P = 2L + 2W }}}
given:
{{{ L = W + 2.1 }}} m
{{{ P = 20.6 }}} m
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By substitution,
{{{ 20.6 = 2*( W + 2.1 ) + 2w }}}
{{{ 20.6 = 2W + 4.2 + 2W }}}
{{{ 4W = 20.6 - 4.2 }}}
{{{ 4W = 16.4 }}}
{{{ W = 4.1 }}}
{{{ L = W + 2.1 }}}
{{{ L = 4.1 + 2.1 }}}
{{{ L = 6.2 }}}
the dimensions are 4.1 x 6.2 m2
check:
 {{{ P = 2L + 2W }}}
 {{{ 20.6  = 2*6.2 + 2*4.1 }}}
{{{ 20.6 = 12.4 + 8.2 }}}
{{{ 20.6 = 20.6 }}}
OK