Question

Pierre stands on level ground at the point P, 5 metres from O.

Answer 1

So hmm notice the picture below

thus    $\bf \cfrac{4.24}{x}=\cfrac{2x+5}{2x}\implies 8.48x=2x^2+5x\implies 8.48x-5x=2x^2 \\\\\\ 3.48x=2x^2\implies 0=2x^2-3.48x\implies 0=x(2x-3.48) \\\\\\ \begin{cases} 0=x\\ ----------\\ 0=2x-3.48\\ 3.48=2x\\\\ \cfrac{3.48}{2}=x\\\\ 1.74=x \end{cases}$

so, is clearly not 0, so it has to be 1.74