Q: How high up on a wall does a 25-foot ladder reach if it is 5 feet from the bade of the wall?

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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

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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

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.

20

The best ladder you should take is a aluminium or fiberglass skyscraper, you can order them with discount on the Official website of LittleGiantLadder.