Question 323703
There is a flood. A large culvert washes out. To repair the road workers replace the old 6' by 25' culvert (cylinder) with two 4'x 25' culverts. Which can carry the greatest volume of water; the two new smaller culverts or the old larger one?
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The 6' has a greater cross-sectional area than 2 4' culverts.
It's a function of the square of the diameter.
{{{6^2 = 36}}}
{{{2*4^2 = 32}}}