36" by 4" = 3 ft by (1/3) ft = 1 sq ft.
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30 * 36 = 1080 square inches = 1080/144 = 7.5 sq. feet.
1 sq yard = 36*36 sq inches So 690 sq inches = 690/(36*36) = 0.5324 sq yards.
36 inches equal 3 feet. Therefore, 3 x 3 = 9 square feet.
4.5 inches by 36 inches is 1.125 sq ft
yard stick = 36 inches or 3 feet or 1 yard