There are 640 acres in a square mile,and 5280 feet in 1.00 mile.What is the length in feet (to the nearest foot)of the side of a square having an area of 1.00 acre?
A)660 feet
B)209 feet
C)165 feet
D)412 feet
E)435 feet

Question

Quizplus · Accepted Answer

To find the length of the side of a square with an area of 1 acre, first convert acres to square feet. Since there are 640 acres in a square mile and 5280 feet in a mile, 1 square mile is 5280^2 square feet. Therefore, 1 acre is (5280^2)/640 square feet. The side length of the square is the square root of this area, which is approximately 209 feet.

There Are 640 Acres in a Square Mile,and 5280 Feet