Question 155516
{{{(8/(15+x))=(1.7/x)}}}
then
{{{8x=1.7(15+x)}}}

{{{8x=25.5+1.7x}}}
{{{6.3x=25.5}}}
{{{x=25.5/6.3=4.047619}}}

Answer: 4.0477 m (aprox)