Question 710510
Think of one car as standing still and the other
approaching at the sum of their speeds
Let {{{ s }}} = the speed of the slower car in mi/hr
{{{ s + 8 }}} = the speed of the faster car in mi/hr
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{{{ 310 = ( s + s + 8 )*2.5 }}}
{{{ 310 = ( 2s + 8 )*2.5 }}}
{{{ 310 = 5s + 20 }}}
{{{ 5s = 290 }}}
{{{ s = 58 }}}
{{{ s + 8 = 66 }}}
Their speeds are 58 mi/hr and 66 mi/hr