Question 773184
Let {{{ s }}} = a side of the smaller triangle
{{{ 2s }}} = a side of the larger triangle
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{{{ 3s }}} = the sum of the 3 sides of the smaller triangle
{{{ 3*( 2s ) = 6s }}} = the sum of the 3 sides of the larger triangle
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{{{ 3s + 6s = 90 }}}
{{{ 9s = 90 }}}
{{{ s = 10 }}}
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{{{ 3s }}} = the sum of the 3 sides of the smaller triangle
{{{ 3s = 3*10 }}}
{{{ 3s = 30 }}}
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{{{ 3*( 2s ) = 6s }}} = the sum of the 3 sides of the larger triangle
{{{ 6s = 6*10 }}}
{{{ 6s = 60 }}}
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The rod should be cut into a 30 cm piece
and a 60 cm piece