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" Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30| square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq. "
How to Become Quick at Figures: Comprising the Shortest, Quickest, and Best ... - Page 115
by D. M. Garret - 1886 - 190 pages
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Shop Mathematics ...: Shop arithmetic

Earle Bertram Norris, Kenneth Gardner Smith, Ralph Thurman Craigo - Arithmetic - 1912 - 208 pages
...foot (sq. ft.) 9 square feet.= 1 square yard (sq. yd.) 30 J square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A) 640 acres = 1 square mile (sq. mi.) 68. Area of a Circle. — If a circle is drawn in a square as shown in Fig. 19, it is easily seen that...
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Hamilton's Arithmetics, Book 2

Samuel Hamilton - Arithmetic - 1913 - 338 pages
...foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30} square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres .- 1 square mile (sq. mi.) 1 A. = 160 sq. rd. = 4840 sq. yd. = 43,560 sq. ft. Written Work Change : 1. 2700 sq. yd. to sq. ft....
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The Coal Miner's Handbook: A Handy Reference Book for Coal Miners, Pit ...

International Correspondence Schools - Coal mines and mining - 1913 - 360 pages
...square foot sq. ft. 9 square feet =1 square yard sq. yd. 30} square yards =1 square rod sq. rd. 160 square rods =1 acre A. 640 acres =1 square mile sq. mi. 9Q. mi. A . sq. rd. sq. yd. sq. ft. sq. in. I = 640=102,400 = 3,097,600 = 27.878,400 = 4,014,489,600...
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The Civil Engineer's Handbook: A Convenient Reference Book for Chainmen ...

International Correspondence Schools - Civil engineering - 1913 - 456 pages
...square foot sq. ft. 9 square feet = 1 square yard sq. yd. 30i square yards = 1 square rod sq. rd. 160 square rods =1 acre A. 640 acres =1 square mile sq. mi. sq. mi. A. sq. rd. sq. yd. sq. ft. sq. in. 1=640=102,400=3,097,600 = 27,878,400=4,014,489,600 SURVEYOR'S...
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Electric Interlocking Handbook

General Railway Signal Company - Railroad switches - 1913 - 452 pages
...square feet, . . . . = 1 square yard (sq. yd.) 30Vi square yards, . . . . = 1 square rod (sq. rd.) 160 square rods, . . . . = 1 acre (A) 640 acres =1 square mile (sq. mi.) 1 sq. mi. =640 acres = 102,400 sq. rd. =3,097,600 sq. yd. = 27,878,400 sq. ft. =4,014,489,600 sq. in....
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Will's Commercial Arithmetic: Presenting the Best Usage in Modern Business ...

William Russell Will - Business mathematics - 1913 - 316 pages
...circumference of the earth. MEASURES OF SURFACE (sq. yd.); 30J square yards = 1 square rod (sq. rd.); 160 square rods = 1 acre (A); 640 acres = 1 square mile (sq. mi.). 147. Surveyors' square measure is used by surveyors in measuring land. Scale: 10,000 square links (sq....
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Arithmetic

United States. Bureau of Naval Personnel - Arithmetic - 1913 - 144 pages
...foot (sq. ft. ) 9 square feet =1 square yard (sq. yd. ) 30A square yards =1 square rod (sq. rd. ) 160 square rods =1 acre (A. ) 640 acres = 1 square mile (sq. mi.) Sq.mi. A. Sq.rd. Sq. yd. Sq.ft. Sq. in. 1 = 640=102,400=3,097,600=27,878,400=4,014,489,600. Scale 640,...
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Electric Interlocking Handbook by the Engineering Staff of the General ...

General Railway Signal Company - Railroads - 1915 - 435 pages
...square feet ..... =1 square yard (sq. yd.) . rd.) square yards, . . . . = 1 square rod (sq. rd.) 160 square rods, . . . . = 1 acre (A) 640 acres, ....... =1 square mile (sq. mi.) 1 sq. mi. =640 acres = 102,400 sq. rd. = 3,097,600 sq. yd.= 27,878,400 sq. ft. =4,014,489,600 sq. in....
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Everyday Arithmetic: A Practical Mental Arithmetic

John B. Gifford - Arithmetic - 1914 - 216 pages
...= 1 square yard (sq. yd.) 272| square feet I = 1 S< * uare rod <"* rd ' } 30| square yards 1 , 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq. mi.), or section 36 square miles - 1 township (tp.) 100 square feet •" 1 square (in roofs, floors, etc.)...
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The Stone-Millis Arithmetics

John Charles Stone, James Franklin Millis - Arithmetic - 1914 - 360 pages
...foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30 J square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq. mi.) 3. How many square feet in a square rod ? 6. A strip of ground 16 rods long and 10 rods wide contains...
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