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How long is it?

One ladder is 7 feet longer than another. Each is placed on level ground with its lower end 8 feet from the foot of a vertical wall. The longer ladder reaches 9 feet farther up the wall. How long is it?

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Michael F. | Mathematics TutorMathematics Tutor
4.6 4.6 (5 lesson ratings) (5)
There is no real solution to this problem.  One ladder is 7 feet longer than the other.  Even placed at the wall together they would only differ in height along the wall by 7 feet.