Question 1150546
Let {{{ r[1] }}} =rate going uphill
{{{ 120 / r[1] = 2/1 }}}
{{{ r[1] = 60 }}}
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Let { r[2] = rate on flat land
{{{ 60/r[2] = (2/3)/1 }}}
{{{ r[2] = 90 }}}
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{{{ d = r[2]*t }}}
{{{ 45 = 90t }}}
{{{ t = 1/2 }}}
It takes a half hour to go 45 miles