32
To solve this, we used the theorem of Pythagorus which states that in a right angle triangle:
a^2 + b^2 = c^2 (where ^2 means to the power roof 2 or squared)
In the case of this ladder, c=25 and a=7
==> b^2 = 25^2 - 7^2 = 625 - 49 = 576
==> b = sq rt (576) = 24.
In fact this is the week known 7, 24, 25 right triangle.
The ladder reaches 24 feet up the side of the building.
115
It should be placed 2 ft from the wall
That's going to depend heavily on two things:-- Do you want to be able to stand the ladder up and lean it against the wall ?-- How high above the ground do you want the ladder to hit the wall ?You haven't really said anything about these specifications in your question.If you want the ladder to lean against the wall, and hit it exactly at the top that is24-ft high, then the length of the ladder must besqrt( [6]2 + [24]2 ) = sqrt( 36 + 576 ) = sqrt(612) = 24.739 ft (rounded)
I've heard it said that the vertical should be 4 times the size of the base (of the right angle triangle). Therefore if a 12 foot ladder would reach about an 11 foot vertical, it would be placed just under 3 feet from the wall.I've also seen it said that the angle should be 75.5 degrees.Personally I do not agree with an absolute. At heights under 10 feet, your center of gravity (especially if you are a very large person) might cause the ladder to move away from the wall while you are climbing, therefore a more shallow angle may be appropriate.At heights over 20 feet, I like to ensure good pressure against the wall when I am at the top. This feels more secure on a windy day. A more shallow angle can help, but ONLY if the base of the ladder is braced. For instance I've braced the bottom against a big tree, or a long plank that spans between the two wheels of a car.At heights over 25 feet especially you've just got to rule out all variables because it only takes one fall in a thousand trips up a ladder to end your fun (income, health, life). Stand back and look at your angles, test how the ladder feels as you go up, adjust as many times as you have to, brace the bottom, tie off the top, never compromise.
they should be placed with the small cases on the bottom and the larger ones on top.
56
13 feet
115
It can be any angle that is more than zero degrees and less than 90 degrees. <><><> It will be an ACUTE angle, and if the ladder is placed properly (1 ft out for each 4 ft up) the angle between wall and ladder will be ABOUT 18 degrees.
10,000 m
3 ft
15 meters, or less, depending on the angle.
3 FEET
20
Concrete words are placed lower on the ladder, and more abstract terms are placed higher, or closer to the top.
It should be placed 2 ft from the wall
1/4 the height of the ladder. (flat top on rungs should be level when ladder is placed right.