Question 996662
{{{d}}}= length of one lap, in meters
{{{d/8.5}}}= time for the first lap, in seconds
{{{d/8}}}= time for the second lap, in seconds
So,
{{{d/8.5+d/8=99}}}
{{{(8d+8.5d)/(8.5*8)=99}}}
{{{16.5d/68=99}}}
{{{d=99*68/16.5}}}
{{{d/8=99*68/(16.5*8)}}}
{{{d/8=highlight(51)}}}= time for the second lap, in seconds,
and
{{{99-51=highlight(48)}}}= time for the first lap, in seconds.