The length of the ladder is 13 feet.
Explanation:
- The length of the ladder forms the hypotenuse of the right triangle.
- The two legs of the right triangle are 5 feet and 12 feet.
From the Pythagorean Triplets (5,12,13) :
It can be determined that the longest side called hypotenuse is 13 feet.
Therefore, the length of the ladder = 13 feet.