| Timothy Walker - 1829 - 156 σελίδες
...the remainder. 183. By applying the above rules, the following questions will be readily answered. 1. How long must a ladder be to reach the top of a wall 60 feet high, the foot of the ladder being 12 feet from the wall ? 2. A prop 30 feet long has... | |
| Timothy Walker - 1829 - 138 σελίδες
...— . 183. By applying the above rules, the following ques- /£^t<) tions will be readily answered. 1. How long must a ladder be to reach the top of af~l wall 50 feet high, the foot of the ladder being 12 feet from the wall f 2. A prop 30 feet long... | |
| George Hutton (arithmetic master, King's coll. sch.) - 1844 - 276 σελίδες
...of 18 feet from the base of a building to support a jamb 24 feet from the ground ? Ans. 30 feet. 12. How long must a ladder be to reach the top of a wall, 41 feet 3 inches in height from the surface of a river 23 yds. 1 foot in breadth, which flows... | |
| George Roberts Perkins - 1846 - 266 σελίδες
...being given, the third side can be found. EXAMPLES. 1. How long must a ladder be, to reach to the^top of a house 40 feet high, when the foot of it is 30 f$et from the house ' In this example, it is obvious that the ladder forms the hypotenuse of a right-angled... | |
| George Roberts Perkins - 1849 - 356 σελίδες
...square of the other side. By means of these properties, when two sides of a right-angled triangle are given, the third side can be found. EXAMPLES. 1. How...this example, it is obvious that the ladder forms the hypothenuse of a right-angled triangle, whose sides are 30 and 40 feet, respectively. Therefore, the... | |
| George Roberts Perkins - 1850 - 364 σελίδες
...triangle being given, the third side can be found. EXAMPLES. 1. How long must a ladder be, to reach to the top of a house 40 feet high, when the foot of...ladder must equal the sum of the squares of 30 and 40. 302=: 900 40^ = 1600 -V/25 )0 = 50, the length of the ladder. 2. Suppose a ladder 100 feet long, to... | |
| George Roberts Perkins - 1850 - 356 σελίδες
...square of the other side. By means of these properties, when two sides of a right-angled triangle are given, the third side can be found. EXAMPLES. 1. How...this example, it is obvious that the ladder forms the hypothenuse of a right-angled triangle, whose sides are 30 and 40 feet, respectively. Therefore, the... | |
| George Roberts Perkins - 1855 - 388 σελίδες
...triangle being given, the third side can be found. EXAMPLES. 1. How long must a ladder be, to reach to the top of a house 40 feet high, when the foot of...this example, it is obvious that the ladder forms ths hypotenuse of a right-angled triangle, whose sides are 30 and 40 feet respectively. Therefore,... | |
| George Roberts Perkins - 1865 - 360 σελίδες
...triangle being given, the third side can be found. EXAMPLES. 1. How long must a ladder be, to reach to the top of a house 40 feet high, when the foot of...this example, it is obvious that the ladder forms tha hypotenuse of a right-angled triangle, whose sides are 30 and 40 feet respectively. Therefore,... | |
| Ohio. Department of Education - 1876 - 386 σελίδες
...of cloth, Ц yards wide, to clothe 220 men, how many yards, .V4 wide, will it take for 121 men ? 10. How long m,ust a ladder be to reach the top of a tree 80 feet high, when the foot of it is ti0 feet from the tree ? ORTHOGRAPHY. 1 . Of what does orthography... | |
| |