Question 857329
Let {{{ d }}} = the distance Bala is behind 
when Ahmad crosses the line
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When Ahmad crosses the finish line, Bala is
going to cross in {{{ 245 - 235 = 10 }}} sec
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Bala's speed is:
{{{ 800 / 245 = 160 / 49 }}} m/.sec
{{{ d = ( 160/49 )*10 }}}
{{{ d = 1600/49 }}}
{{{ d = 32.653 }}} 
Bala is 32.653 m from the finish line
when Ahmad crosses
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check:
{{{ 800 - 32.653 = 767.347 }}}
Bala covers this distance in {{{ 235 }}} sec
{{{ 767.347 / 235 = 3.265 }}} m/sec
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Now I can say:
{{{ 3.265 = 800/245 }}}
{{{ 3.265 = 3.265 }}}
Seems to check OK -hope I got it