A ladder is leaning against a building The base of the ladder is 5 feet from the building The building is perpendicular to the ground and the top of the ladder reaches 10 feet high on the building?

Answer 1

15

Answer 2

This depends on the length of the ladder. If the ladder is about 11.2 ft long, then it will reach 10 feet high on the building.

Ans2:This ladder setup will put the user at risk. The proper height to base distance gives a 4:1 ratio, that would give the ladder a ~15 deg angle with the wall. The setup described gives a 30 deg angle with the wall.

The base of the ladder should be brought in so that it is at 2.5 feet from the wall. If the ladder is to be used for roof access, it should extend 3 feet past the edge so the user can use the ladder for support as he steps onto the roof. Additionally, the ladder should be tied to the roof at an appropriate anchor point.

To calculate the length of the ladder you apply Pythagoras: (B2 + W2)0.5 = L

...where B is the base to wall distance, W is the height of the wall and L is the ladder length.

Note: Raising a value to the 0.5 power is the same as taking the square root of that value...you can't show a square root radical in WA's text format.