According to Pythagorean theorem AB2=AO2+OB2, we can get:

OA==2.4 meters,

At present, the top of the ladder falls by 0.4m, that is, OC = 2.4-0.4 = 2m.

CD=AB=2.5 meters,

So DO2=CD2-CO2 in the right triangle COD,

That is, do = = 1.5m,

So the distance from the bottom of the ladder to the outside is1.5m-0.7m = 0.8m. 。

Answer: The distance from the bottom of the ladder to the outside is 0.8 meters.

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