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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...
Practical Arithmetic: In Four Books ... Extracted from the Large and Entire ... - Σελίδα 288
επεξεργασία από - 1813 - 348 σελίδες
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## Arithmetical Collections and Improvements: Being a Complete System of ...

Anthony Birks, John Birks - 1766 - 611 σελίδες
...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,...

## The Tutor's Guide: Being a Complete System of Arithmetic; with Various ...

Charles Vyse - 1785 - 325 σελίδες
...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...

## The Tutor's Guide: Being a Complete System of Arithmetic; with Various ...

Charles Vyse - 1806 - 320 σελίδες
...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)...

## The American Tutor's Guide: Being a Compendium of Arithmetic. In Six Parts ...

James Thompson - 1808 - 172 σελίδες
...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...

## Mathematics, Τόμος 2

Samuel Webber - 1808
...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 ?...

## The Tutor's Guide: Being a Complete System of Arithmetic; with Various ...

Charles Vyse - 1815 - 320 σελίδες
...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)...

## The Complete Practical Arithmetician: Containing Several New and Useful ...

Thomas Keith - 1822 - 332 σελίδες
...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...

## Elements of Arithmetic

Etienne Bézout - 1824 - 219 σελίδες
...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?...

## The Youth's Assistant in Theoretick and Practical Arithmetick ...

Zadock Thompson - 1826 - 164 σελίδες
...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...

## The Youth's Assistant in Theoretic and Practical Arithmetic, : Designed for ...

Zadock Thompson - 1828 - 225 σελίδες
...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...