$$\left. \begin{array} { l } { \sqrt { 225 } + \sqrt { 0.25 } + \sqrt { 0.25 } = 425 f ( 14 ) \right.$$
$f=\frac{8}{2975}\approx 0.002689076$
$$15+\sqrt{0.25}+\sqrt{0.25}=425f\times 14$$
$$15+0.5+\sqrt{0.25}=425f\times 14$$
$$15.5+\sqrt{0.25}=425f\times 14$$
$$15.5+0.5=425f\times 14$$
$$16=425f\times 14$$
$$16=5950f$$
$$5950f=16$$
$$f=\frac{16}{5950}$$
$$f=\frac{8}{2975}$$
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