A boy is three years than his sister. Three years ago he was two-thirds of his sister's age.What are their present ages?
2 answers:
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Answer:
<em>The ladder touches the wall at 24 feet from the ground.</em>
Step-by-step explanation:
The wall of the building, the ground, and the ladder form a right triangle, whose longer side is the length of the ladder.
In any right triangle, we can apply Pythagora's theorem to find any missing side length.
The ladder is 26 feet in length, the distance from the bottom of the ladder and the building is 10 feet. Calling H to the distance above the ground where the ladder touches the wall, then:
Calculating:
Solving:
H=24 feet
The ladder touches the wall at 24 feet from the ground.