Question 990561
You can think of this as one person standing still
and the other walking towards the other at
the sum of their speeds
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Let {{{ t }}} = time in hrs
{{{ 36 = ( 3 + 5 )*t }}}
{{{ 36 = 8t }}}
{{{ t = 4.5 }}}
They meet 4.5 hrs after dawn
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check:
{{{ d[1] = 3t }}}
{{{ d[1] = 3*4.5 }}}
{{{ d[1] = 13.5 }}} km
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{{{ d[2] = 5t }}}
{{{ d[2] = 5*4.5 }}}
{{{ d[2] = 22.5 }}} km
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{{{ 13.5 + 22.5 = 36 }}}
OK