Question 882642
7 PM to 7:50 PM is 50 minutes
50 minutes  = 50/60 hrs
50/60 hrs = 5/6 hrs
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Paul's rate is {{{ 40/(5/6) }}} mi/hr
{{{ 40/(5/6) = ( 6*40 )/5 }}}
{{{ ( 6*40 )/5 = 48 }}} mi/hr
{{{ d(t) = r*t }}}
{{{ d(t) = 48t }}}