∴∠DBF=α=45。

∴Rt△DBF，BF = DF = 268 ......................................................................................................................................................

BC = 50，

∴CF=BF-BC=268-50=2 18.

According to the meaning of the question, the quadrilateral DFOG is a rectangle,

∴FO=DG= 10.

∴ co = cf+fo = 218+10 = 228 .............................................................................., 5 points.

In Rt△ACO, β = 60,

∴AO=CO？ Tan 60 ≈ 228×1.732 = 394.896 .............................................. 7 points.

The error is 394.896-388 = 6.896 ≈ 6.9 (m).

That is, the error between the calculated results and the actual height is about 6.9 meters.