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20
Using Pythagoras' theorem the length of the ladder is 20.248 feet
Regard the ladder as the hypotenuse and the distance from the wall as one leg of a right angled triangle. Then, 262 = 102 + H2 : where H is the height reached up the wall by the ladder. H2 = 676 - 100 = 576 : H = √576 = 24
12 feet.
Use Pythagoras' theorem: 122-32 = 135 and its square root gives the answer of 11.619 feet rounded to 3 decimal places
he should bud the ladder so it wouldn't be able to reach
17
20
9.2
30 feet. And you don't have to round it to the nearest foot. It's exactly 30 feet.
10.9 [11]
It depends if you want the ladder to overhang or to be set under but I would say 2 feet or 2/3 of a meter
To safely install a ladder on stairs to reach high places, you can use a ladder stabilizer or standoff to ensure stability. Make sure the ladder is the right height and angle for the stairs, and always have someone hold the ladder while you climb. Additionally, use non-slip feet and secure the ladder at the top to prevent it from slipping.
30
Hypotenuse = 20/sin580 = 23.58356807 Length of ladder: rounded to 23.584 feet
Assuming it is a two section ladder then it must therefore have a minimum length of 28 feet.
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