Question 762824
For each potato, the runner goes from the basket
to the potato, and back to the basket
so, the distance for each potato is doubled
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After the 1st potato, {{{ 10 }}} is added to the
one-way distance to each potato. There are
{{{ 10 }}} potatoes, so {{{ 10*10 = 100 }}} is
added to the sum of the  one-way distances
traveled by the runner  
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The sum of all these additions is then doubled
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Let {{{ d }}} = total distance covered by runner
{{{ d = 2*10 + 2*( 6 + 12 + 18 + 24 + 30 + 36 + 42 + 48 + 54  + 100 ) }}}
{{{ d = 20 + 2*( 270 + 100 ) }}}
{{{ d = 20 + 2*370 }}}
{{{ d = 20 + 740 }}}
{{{ d = 760 }}} m