Question 630308
For the 1st mile,
{{{ d = r*t }}}
{{{ 1  = 6*t }}}
{{{ t = 1/6 }}} hr
{{{ (1/6) *60 = 10 }}} min
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She spent 10 minutes walking the 1st mile,
so there were {{{ 90 - 10 = 80 }}} minutes
left to walk the remaining 2 miles.