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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

## 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...

## 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....

## 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...

## 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....

## 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....

## 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...

## 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...

## 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...