A building is 3 ft from a 7​-ft fence that surrounds the property.

Question

A building is

3ft from a 7​-ft fence that surrounds the property. A worker wants to wash a window in the building 12 ft from the

ground.ground. He plans to place a ladder over the fence so it rests against the building.​He decides he should place the ladder 7 ft from the fence for stability. To the nearest tenth of a​ foot, how long a ladder will he​ need?

Answer 1

7 ft fence 3 feet from a building and 7 feet from bottom of a ladder

ladder is 7sqr2 +3sqr2= 10sqr2 feet long

= about 10(1.414)= 14.1 feet

construct a right triangle, base = 3+7=10 feet

altitude = 10 feet

hypotenuse = square root of (10^2 +10^2) = 10sqr2 = ladder length