$$\frac { 163 } { 12 } \sqrt { \frac { 31 } { 2 } }$$
$\frac{163\sqrt{62}}{24}\approx 53.477636811$
$$\frac{163}{12}\times \frac{\sqrt{31}}{\sqrt{2}}$$
$$\frac{163}{12}\times \frac{\sqrt{31}\sqrt{2}}{\left(\sqrt{2}\right)^{2}}$$
$$\frac{163}{12}\times \frac{\sqrt{31}\sqrt{2}}{2}$$
$$\frac{163}{12}\times \frac{\sqrt{62}}{2}$$
$$\frac{163\sqrt{62}}{12\times 2}$$
$$\frac{163\sqrt{62}}{24}$$
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