Question 1128851
Add their rates of travel
Let {{{ r }}} = the rate of the slower group
{{{ r + 1.5 }}} = the rate of the faster group
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{{{ 1250 = ( r + r + 1.5 )*200 }}}
{{{ 1250 = ( 2r + 1.5 )*200 }}}
{{{ 6.25 = 2r + 1.5 }}}
{{{ 2r = 4.75 }}}
{{{ r = 2.375 }}} mi/hr
and
{{{ r + 1.5 = 3.875 }}} mi/hr
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check:
{{{ 1250 = ( 2.375 + 3.875 )*200 }}}
{{{ 1250 = 6.25*200 }}}
{{{ 1250 = 1250 }}}
OK