A 10 ft ladder is leaning on a wall. The base is touching the floor and the top is touching the wall. Under the ladder there is a box which is 3ft x 3ft x 3ft. and it is pushed hard against the wall on which the ladder is leaning. The ladder is pushed in at the base so that the ladder just touches the corner of the box.

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An old one but a favourite of mine.

A 10 ft ladder is leaning on a wall. The base is touching the floor and the top is touching the wall. Under the ladder there is a box which is 3ft x 3ft x 3ft. and it is pushed hard against the wall on which the ladder is leaning. The ladder is pushed in at the base so that the ladder just touches the corner of the box.

How high does the ladder reach up the wall ?

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