 | Anthony Birks, John Birks - Arithmetic - 1766 - 640 pages
...or 97. leagues. 6. A line 17 yards long will exa£Uy reach from the top of a fort, on the oppofite bank of a river, known to be 23 yards broad : the height of the wall is required. 27 X 3 . = 81 feet, 23 x 3 = 69 feet. 81 X 81 = 6561 -._> 69 x 69 = 4761 J 1800 = 42.426 = 42 feet,... | |
 | Charles Vyse - Arithmetic - 1785 - 350 pages
...the fame by a Window 2 r P'eet high on the other Side ; the Breadth of the Street is required ? 10. A Line 27 Yards long, will exactly reach from the Top of a Fort, on the cppofile Bank of a River, known to be 23 Yards broad : The Height of the Wall is required ? 11. Suppoie... | |
 | Charles Vyse - Arithmetic - 1806 - 342 pages
...do the same by a Window 21 Feet high on the other Side. The Breadth of the Street is required ? (10) A Line, 27 Yards long, will exactly reach from the Top of a Fort to the opposite Bank of a River, known to be 23 Yarda broad. The Height of the Wall is required ? (11)... | |
 | James Thompson - Arithmetic - 1808 - 176 pages
...window 21 feet high on the other side : thebreadth of the street is required ! Ans. 56.64 feet. 35. A line 27 yards long, will exactly reach from the...yards broad : the height of the wall is required. Ans. 14.142 yds. 37. Suppose a light-house built on the top of a rock, the distance between the place... | |
 | Samuel Webber - Mathematics - 1808 - 520 pages
...upright of a building, will support a jamb 23 feet 10 inches from the ground. Ans. 26 feet 3 inches. 3. A line, 27 yards long, will exactly reach from the top of a for^to the opposite bank of a river, known to be 23 yards broad ; what is the height of the wall ?... | |
 | Charles Vyse - Arithmetic - 1815 - 340 pages
...do the same by a window 21 feet high on the other side. The breadth of the street is required. (10) A line, 27 yards long, will exactly reach from the top of a fort to the opposite bank of a river, known to be 23 yards broad. The height of the wall is required. (11)... | |
 | Thomas Keith - Arithmetic - 1822 - 354 pages
...30 — 24= 6 diiference of the given sides. V'54x6=V5i4=18. Answer. (31.) A line 27 yards long will reach from the top of a fort on the opposite bank of a river to the water edge on this side of the river; what is the height of the fort, the river being 24 yards... | |
 | Etienne Bézout - Mathematics - 1824 - 238 pages
...the square of the remaining side ; the square root of this square will be the length of the side. 29. A line 27 yards long will exactly reach from the top of a fort to the opposite bank of a river, which is known to be 23 yards broad ; what is the height of the fort?... | |
 | Zadock Thompson - Arithmetic - 1826 - 176 pages
...street 21 feet from the ground; what is the width of the street? Ans. 56.664. feet. 5. A line 81 feet long, will exactly reach from the top of a fort, on the opposite ban'k of a river, known to be 69 feet broad ; the height of the wall is required ? Ans. 42.425 feet. 6. Two ships sail from the same... | |
 | Zadock Thompson - Arithmetic - 1828 - 238 pages
...street 21 feet from the ground; what is the width of the street ? Ans. 56.64+ feet. 5. A line 81 feet long, will exactly reach from the top of a fort, on the oppnsite hank of a river, known to he 69 feet hroad ; the height of the wall is required. Ans. 42.425... | |
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Suppose a ladder 40 feet long be so planted as to reach a window 33 feet from the ground, on one side of the street, and without moving it at the foot, will... 
