Horse Fence

Farmer Finnegan needs to build a fence to keep his horses on his property. He only has a little over 1.5 miles of fence materials, but there’s also a mile-long straight river running through his property. What shape should he use for the fenced in area to give his horses the most space possible?

Our dear friend Finnegan should build a half-circle fence with the river as the diameter, giving the horses about 0.4 square miles to frolic and play in.

Area of semi-circle = πr2 / 2 = π × .5 miles2 / 2 = 0.3927

Posted in Brain Teasers


1 Comment on "Horse Fence"

Mark W says
March 25, 2022 @ 19:39

Actually, a half honeycomb shape( 3 sides ) may give more area, than a semi-circle?

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