Question 777146
{{{ d = r*t }}}
{{{ 40 = r*t }}}
4:48 minus 4:00 = 48 min
Time in hours is {{{ 48/60 = 4/5  }}} hrs
{{{ 40 = r*(4/5 ) }}}
{{{ r = (5/4)*40 }}}
{{{ r = 50 }}} mi/hr
{{{ 40 = 50*(4/5) }}}