Question 137942
Use the Pythagorean theorem

{{{a^2 + b^2 = c^2}}}
a = 16, b = 31

{{{16^2 + 31^2 = c^2}}}
{{{256 + 961 = c^2}}}
{{{1217 = c^2}}}
{{{sqrt(1217) = c}}}
{{{34.9 = c}}}

So 34.9 meters of bananas ... that's quite a banana banner