Question 481993
You can think of this situation as one of the cars
traveling at the sum of their speeds and the
other car standing still.
The equation is:
{{{ 192 = ( r + r + 10 )* (1 + 36/60) }}}
{{{ 192 = ( 2r + 10 )*1.6 }}}
{{{ 192 = 3.2r + 16 }}}
{{{ 3.2r = 192 - 16 }}}
{{{ 3.2r = 176 }}}
{{{ r = 55 }}}
{{{ r + 10 = 65 }}}
The average speeds are 55 mi/hr and 65 mi/hr