Math CentralQuandaries & Queries


Question from Terrie, a parent:

I have to order fencing for a 25-acre, rectangular field.One side of the field is 1/4 mile. How many yards of fencing do I need to enclose the field?


Each acre is 4840 square yards. 1/4 of a mile is 1760/4 yards.

So your field is 4840x25 square yards. Divide that by the length of one side and you get the length of the other side:
(4840 x 25) / (1760 / 4)

Knowing the lengths of both sides, you can just add up all the sides that require fencing.

Stephen La Rocque.

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