Question 481421
Let {{{r}}} = the rate of the slower one in km/hr
{{{ r + 10 }}} will be the rate of the faster one in km/hr
They are moving apart at the sum of the 2 rates
The sum of the rates is {{{ r + r + 10 = 2r + 10 }}}
-----------
{{{ 212.5 = (2r + 10)*1.25 }}}
{{{ 212.5 = 2.5r + 12.5 }}}
{{{ 2.5r = 212.5 - 12.5 }}}
{{{ 2.5r = 200 }}}
{{{ r = 80 }}}
{{{ r + 10 = 90 }}}
Their rates are 80 km/hr and 90 km/hr