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" From the edge of a ditch 18 feet wide, surrounding a fort, I took the angle of elevation of the top of the wall and found it 62 40... "
A Treatise on Mensuration, Both in Theory and Practice - Page 62
by Charles Hutton - 1788 - 703 pages
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Mathematics: Compiled from the Best Authors and Intended to be the ..., Volume 2

Mathematics - 1801 - 426 pages
...height of the centre of the instrument added. . 2. From the edge of a ditch 18 feet vide, surrounding a. fort, I took the angle of elevation of the top...the height of the wall, and the length of a ladder necessary to rcnch from my station to the top of it. As radius 90 : tangent of ,62 40' :: BA 18...
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A Course of Mathematics in Two Volumes for the Use of Academies as Well as ...

Charles Hutton - Mathematics - 1807
...surrounding a fort, having taken the angle of elevation of the top of the wall, it was found to be 62 40' : required the height of the wall, and the length of a ladder to reach from my station to the top of it? AC height of wall 69'64, Ans> Bladder, 78 -4 feet. EXAM....
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Mathematics, Volume 2

Samuel Webber - Mathematics - 1808
...height of the centre of the instrument added. 2. From the edge of a ditch 18 feet wide, surrounding a fort, I took the angle of elevation of the top of the wall, and found it 62 4O' ; required the height of the wall, and the length of a ladder necessary to reach from my station...
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A Course of Mathematics ...: Composed for the Use of the Royal Military ...

Charles Hutton - Mathematics - 1811
...surrounding a fort, having taken the angle of elevation of the top of the wall, it was found to be 62 40' : required the height of the wall, and the length of a ladder to reach from my station to the top of it? A / ne'8nt f wa^ 69-64, /u's'i ladder, 78-4 feet. EXAM....
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A Course of Mathematics: For the Use of Academies, as Well as Private ...

Charles Hutton - Mathematics - 1822
...surrounding a fort, having taken the angle of elevation of the top of the wall, it was found to be 62 40' : required the height of the wall, and the length of a ladder to reach from my station to the top of it ? . i height of wall 69-64, ns- I ladder, 78 4 feet. EXAM....
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Elements of Plane Trigonometry

William Smyth - Plane trigonometry - 1834 - 72 pages
...is inclined to the ground ? Ans. 23 3' 55". 4. From the edge of a ditch 18 feet wide, surrounding a fort, I took the angle of elevation of the top of...the height of the wall, and the length of a ladder necessary to reach from my station to the top of it. Ans. Height 34.82, length 39.2 feet. 5. A ladder...
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An Elementary Treatise on Algebra, in Theory and Practice: With Attempts to ...

John D. Williams - Algebra - 1840 - 605 pages
...surrounding a fort, having taken the angle of elevation of the top of the wall, it was found to be 62 40' : required the height of the wall, and the length of a ladder to reach from my station to the top of it. Ans. height of wall 69.64, ladder 78.4 feet. 633. Required...
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An introductory treatise on mensuration, in theory and practice

John Radford Young - Measurement - 1850 - 12 pages
...and which snrronnded a fort, the angle of elevation of the top of the wall was taken, and found to be 62 40': required the height of the wall, and the length of a ladder necessary to scale it. Ans. Height of wall, 34-82 feet; and length of ladder, 39-2 feet. 5. The angle...
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A complete system of mensuration, with additions by J. Trotter

Alexander Ingram - 1851
...steeple. Ans. 147-985 feet. 3. The elevation of a wall, taken from the edge of the ditch 18 feet wide, was 62 40-. Required the height of the wall, and the length of a ladder to reach the top of it. Ans. Height 34-8246, ladder 39-20153 feet. 4. At 85 feet from the bottom of...
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Elements of Plane Trigonometry

William Smyth - 1852
...is inclined to the ground ? Ans. 23 3' 55". 4. From the edge of a ditch 18 feet wide, surrounding a fort, I took the angle of elevation of the top of the wall and found it 62 4 0' ; required the height of the wall, and the length of a ladder necessary to reach from my station...
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