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A standard interior staircase has steps each with a rise (height) of 18 cm and a run (horizontal depth) of 20 cm.

A standard interior staircase has steps each with a rise (height) of 18 cm and a run (horizontal depth) of 20 cm. Research suggests that the stairs would be safer for descent if the run were, instead, 22 cm. For a particular staircase of total height 5.22 m, how much farther would the staircase extend into the room at the foot of the stairs if this change in run were made?

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