In Rt△ABC and Rt△ABD, BC and BD are denoted by AB respectively. By using the difference between BC and BD equal to the length of BD, we can get the formula about AB, and then we can find AB.

Solution: In Rt△ABC,

∫∠C = 45，

∴BC=AB，

In Rt△ABD.

∫∠ADB = 60，

∴ BD = AB ∠ Tan ∠ ADB = AB Company,

∫CD = BC-BD = a b-AB = 50，

The solution is AB = 75+25 ≈ 1 18m.

So the answer is 1 18 meters.